I would agree that the Phoenician is #1. In addition to all that was mentioned above, the staff are incredibly friendly and helpful - and someone always seems to be around if you need anything. Location is also quite central.

The Boulders is in Carefree and is pretty far out, the 4 Seasons is at the north end of Scottsdale, and while not as far as the Boulders, it's a pretty long drive to anything in Phoenix. The Sheraton in Chandler is a very nice property - we've stayed there 3 or 4 times and really like it - but not in the same class as the Phoenician and there is not much around at all except a casino. The restaurant at the Royal Palms (T Cook's) is excellent and is very close to the Phoenician.