A warm, clean bed and a shower in the heart of the city. If you want a spa and turn-down service, stay at the airport Hilton. If you prefer to spend your time exploring one of the world's great cities instead of sitting by another hotel pool, this is your place.
Don't waste your time renting a car; all public transit in the city is just a 5-minute walk away. Wifi is decent and a desk in the room is sufficient to work when you aren't out exploring. Also, the coffee shop in front of the lobby makes a superb Americano.