Kay and I first stayed in a Citizen M hotel in Amsterdam for our minimoon after getting married civilly in Zurich. We enjoyed the hotel then, so whenever I see a city with a Citizen M, I am a little partial to choose them. Our flight to Brasilia in December was on a Sunday morning at 8am, so I booked us a room at the airport location to make things easier.
The hotel has an interesting concept that you check yourself in and out (no waiting), as well as supplying the room with ample technology to improve your stay, like multimedia integration and special mood lighting. Using an iPad, you can control the color of the lightning, music, and TV in the room.
The rooms are also very stylish and designed to maximize space utilization. A large king size bed sits wall to wall in rooms, with the front portion of the room towards the hallway used for the bathroom and sink area.
Breakfast was a little lackluster at the Paris location, although there were some gluten free options, all the hot food like eggs and bacon were empty during our entire breakfast and the staff didn’t seem concerned about refilling it, even though it was 6:30am. 
The fruit was also the canned variety, leaving me a little dissatisfied overall, but it was fine for a day.
INSEAD is touted as being in “Paris”, but not really. It took us over two hours to get to the airport from Bois-le-roi by train and metro. So long, that we didn’t have time anymore after check-in to get back into downtown Paris to see the new episode of Star Wars.
Cue sad face, until I looked up nearby shopping mall to the airport and hotel, Aéroville, which was also playing the movie, and made a great place to have a late dinner and drinks before the showing.
This is not the first time I’ve booked an airport hotel for an early flight the next day. After getting up at the butt-crack-of-dawn to get home from London on a Monday morning one time, I decided to reserve a room for us in the Hotel Sofitel Athens Airport to make the early flight back from Greece more bearable.
Have you stayed in an airport hotel the night before a flight?