I am regular at the Zurich Marriott as business brings me to Zurich quite often. I second the ZRH Marriott as they really do treat all guests well.

The hotel has always had a room early when I have requested it and it is usually an upgrade of some kind. They are located on the Lament river and a good many of the rooms have great views of the city and the Lament itself.

I should also add that the hotel runs a bus service to and from the airport(for a fee) but, it is easier to take a train to the airport if you do not have too much luggage.

Also, the Concierge Benzi is the most helpful guy on earth and plans great walking tours of the city. He also picks great restaurants and does not receive any kickbacks, so his choices are places that he eats himself.

Dan