You will hardly find any hotel closer to an airport than the Kempinsiki at MUC. A 2 minutes walk and you'll be greeted very friendly. The open architecture invites you to stay a the bar for a drink and if you are just there for a stop over you won't miss the city (which is far, far away...). Rooms are spacious and clean and you won't hear much noise from the airplanes. Roomservice was very good and on time. Prices are elevated but not a ripp-off.