Poor service leaves a bad taste...
My boyfriend and I booked our stay at the JW through Travelocity. One issue with the Mariott that is very very inconvenient is that they will not guarantee the type of room that you will receive when you book through a third party site. So, when we arrived to check in I asked if we were in a room with a King bed. We were very unkindly told by the check in clerk that we would be in double beds because we had booked through a third party. My boyfriend asked if it was possible to be moved to a king bed as we were traveling as a couple. We were told that there were no king beds avaible in the entire hotel and given a very stern lecture about how the hotel doesn't have to make any guarantees to people who book through third party sites. This was despite the fact that we had never brought up any guarantee having been made, we had simply asked if a king bed was available to be moved to. I immediately felt as though we were being treated like we were second rate. Having my "welcome" to the hotel start out like this left a bad taste in my mouth from the go. 
However, despite the bed situation, the room was clean. The linens were comfortable. However, for a luxery hotel the rooms really lacked luxery. It really struck me that they put far too much money into the lobby and elevator system of this hotel and then did the bare minimum with the rooms. Definatly not worth the extra money of the J.W. designation.