Okay
We stayed at the Sheraton suites for 4 nights on a recent trip to San Diego. The hotel was fine, but not great. We stayed on the club level, but it was not worth it - it included breakfast (which was very poor) and a small selection of nibbles and soft drinks at night. Don't pay the extra money for the club level. 
The room itself was ok, although it was a very small suite. There is definitely matience and cleanliness issues. Also, I don't think the location was that great. There was nothing around, and while the town centre was only a 10 minute walk away, it still seemed like a really isolated hotel. When I booked I was tossing up between the Hilton bay front or this hotel and decided on this one as it was the same price and seemed like it would be better value. Next time I'm in San Diego I'll be booking a hotel around gas lamp quarter or the Hilton bay front.