I purchased this set the day it was released for my LEGO City, as an upgrade from my previous airport (10159 Airport from 2004). First off, the build is great and although it's not very challenging, it's exciting to see the plane come to life and the use of the big plane pieces (eg. the nose, the wings, the tail etc.) was new to me, though I know there have been a number of planes in the past that use these pieces. There are 4 instruction booklets (2 for the plane, one for the airport, and one for the luggage/fuel/stairs car), 8 numbered bags, and two separate bags with the bigger pieces in. This makes the build very easy to follow. The completed set is very grand (especially the plane) in scale, and great looking. It's nice to see that a different colour scheme been used for the plane as opposed to the usual red and white or blue and white colours as seen in previous sets. The plane is HUGE, with a wingspan of around 2 32-wide baseplates (bare this in mind if you want to make a runway). However, despite its huge size, the inside of the plane is very bare. There are 5 seats for the passengers, another one facing backwards which I presume is for the cabin crew (although there isn't a cabin crew minifigure, which would have been a nice addition), and two seats in the cockpit. There's a tiny bathroom at the back of the plane, and a small galley area at the front with a sink and cupboard. There's easily room for a sixth chair in the plane, which I think should have been included, and the space within the plane could've been arranged better to fully optimise the area. The airport terminal has a very nice modern look, and includes the revolving door, tower, waiting area, security scanner and check in desk with luggage conveyor. Although this sounds like a lot of features, the inside of the terminal is, again, very bare and the space could've been used better. There are only 4 seats in the waiting area, and a lot of the space is taken up by the revolving door. The operational conveyor belt for the luggage is a nice touch, though, and there is a fair bit of playability within. The service car is a nice addition to this set and gives it more playability. All the trailers (fuel, stairs and luggage) connect together and attach to the service car, which has a really cool "follow me" sign on the back. This is a really nice addition to the set. Overall, I really like this set because of how it looks and because there's plenty of opportunity for play, but I think a lot more thought could've gone into maximising the space within the plane and the airport. Some more minifigures would have been good, such as a member of the cabin crew, a check-in clerk and a security officer. The value for money is okay with this set, as you do get a lot of big pieces, but the bare interiors are a little disappointing for the price you pay.
With a price tag of £69.99/$79.99 and a piece count of 807 it means you’re paying roughly 8-9p/9-10cents per piece, which isn’t too bad when you look at it that way. This set is also quite unique in that it contains the spoilerific Giant Man brick built figure. Also in the set is the airport control tower, a baggage car and a smaller version of the Quinjet.
Lego (Danish: [ˈleːɡo];[1][2] stylised as LEGO) is a line of plastic construction toys that are manufactured by The Lego Group, a privately held company based in Billund, Denmark. The company's flagship product, Lego, consists of colourful interlocking plastic bricks accompanying an array of gears, figurines called minifigures, and various other parts. Lego pieces can be assembled and connected in many ways to construct objects including vehicles, buildings, and working robots. Anything constructed can then be taken apart again, and the pieces used to make other objects.[3][4]
Correct - the hanger can only accommodate the biplane. That having been said, in order to accommodate the other aircraft too the hangar would have to be huge, with an enormous footprint, and a substantially increased parts count. As a result, I'd estimate a price up to double the current RRP which I suspect few of the target market would pay. LEGO therefore got the size of the hanger right IMHO.
Other than the planes, I do find it unfortunate that the Friends set focuses on shopping and food like so many Friends sets, and I also think it is unfortunate that the City terminal only has the basics of the airport structure in the control tower and service truck. Having a control tower for the Friends set would have been great. Having a gift shop/cafe for the City terminal would have been a worthwhile addition and not something we have seen in many City sets.

The middle section of the terminal (between the B and C gate areas) are dedicated to high-end fashion and accessories, among others you will find Gucci, Burberry and BOSS stores there. Other types of stores — many of which have two outlets, one east and one west of this section — include FineFood (domestic and international delicacies from fine cheese to foie gras and craft beer), WHSmith (books), Scandinavian Souvenirs (self-explanatory), and last but not least the five Heinemann Tax Free stores.
LIC - LEGO Instruction Creator, developed by Jeremy Czajkowski, is a cross-platform, Python, OpenGL & Qt powered desktop application for creating and editing LEGO instruction books. LIC imports 3D models, organizes them into submodels, pages & steps, and exports the end result as images or PDF. A rich, WYSIWYG UI editor, which provides a fully interactive preview window along side a drag & drop-enabled navigation tree, to help organize and layout your book. Portions of LIC are based on work of Remi Gagne. LIC will be part of the AIOI - LDraw All-In-One-Installer.
Bag 7 finished off the front facade adds in a metal detector and the baggage check-in station.  I guess you enter from the right and then maybe the revolving doors are where you can walk out to the plane.  I'm not really sure anymore.  The conveyor belt is a nice addition to the set for playability and is set up so you can pull the baggage cart right next to it.  
If you’ve watched Captain America: Civil War, you’d know that the airport is the scene of one of the coolest superhero showdowns ever, with Team Iron Man and Team Captain America duking it out on the tarmac. The scene is chaotic, gorgeously choreographed and most importantly stolen by the likes of Spider-Man (not included in this set) and Ant-Man transforming into the aptly named Giant-Man.
In 1997 they had an architectural competition for a new 430,000 ft² (40,000 m²) passenger terminal, designed to serve 3.5 million passengers a year, north of the original airport. KHR Architects won the assignment and completed the construction in co-operation with COWI, and at the end of May 2002 the new passenger terminal was put to use, as the first phase of the future expansion, which is scheduled to take place north of the start and runway, while air cargo services, business and private aviation will continue to be served from the existing buildings south of the runway. In connection with this expansion, the largest since the beginning of the airport, it was with effect from 1 January 1997 turned into a Joint-stock company, Billund Airport A/S, with the former members Vejle County and municipalities Vejle, Kolding, Grindsted, Billund, and Give as shareholders.
Primary concept and development work takes place at the Billund headquarters, where the company employs approximately 120 designers. The company also has smaller design offices in the UK, Spain, Germany, and Japan which are tasked with developing products aimed specifically at these markets. The average development period for a new product is around twelve months, split into three stages. The first stage is to identify market trends and developments, including contact by the designers directly with the market; some are stationed in toy shops close to holidays, while others interview children. The second stage is the design and development of the product based upon the results of the first stage. As of September 2008 the design teams use 3D modelling software to generate CAD drawings from initial design sketches. The designs are then prototyped using an in-house stereolithography machine. These prototypes are presented to the entire project team for comment and for testing by parents and children during the "validation" process. Designs may then be altered in accordance with the results from the focus groups. Virtual models of completed Lego products are built concurrently with the writing of the user instructions. Completed CAD models are also used in the wider organisation, for marketing and packaging.[33]
The programmable Lego brick which is at the heart of these robotics sets has undergone several updates and redesigns, with the latest being called the 'EV3' brick, being sold under the name of Lego Mindstorms EV3. The set includes sensors that detect touch, light, sound and ultrasonic waves, with several others being sold separately, including an RFID reader.[52]
The first few bags build the small truck with carts that you see on airport runways. The truck has a "follow me" sign that I confess I have not seen at any airport. There is also a fueling tank and a rolling staircase that sits next to the plane to allow for boarding. Both the tank and the staircase are additional carts for the truck, though I am guessing not both at the same time.
LDStructure, developed by Michael Heidemann, is a tool for analyzing ldraw parts library. With LDStructure you will get a tool that tells you which parts are required to show the current part and where the current part is used in. You will get this information within a second or even quicker. So this tool is a "needs to have" if you are working on parts for the ldraw part library.
The remainder of the build is the control tower and terminal building. First there is a metal detector screener leading to the waiting/secure area of the airport, which seems taller than it needs to be for the minifigures. I think the same effect could have been made with half the height, except that would not allow for an impressive height for the overall tower. However it does seem to be similar to many modern airports with the high ceilings. This area also seems to be someplace to check luggage as evidenced by the rather nifty conveyor belt that comes in a full part. The moving parts of the set include a revolving door (a very tall one, for the first floor) that leads from the secure area of the airport out to the tarmac, and of course the conveyor belt.