Great hotel and location expect the unexpected
Have stayed at the hotel each year since it opened some 5 or 6 years ago. The hotel is perfectly situated at the corner of the Gaslight district on 5th. If you are attending a convention, it is literally across the street. Easy access to all the "action" in downtown San Diego including the ball park. 
Positives: nice size rooms, location, one of if not the finest sushi resturants, Nobu in the hotel, good service. 
Negatives: not really suited for young familes or older visitors or those looking for a quiet night's sleep. This is the happening place with numerous parties, a hyper popular bar, celebrity seekers and all that goes with it. There is Rock and Roll memorabilia and imagery everywhere and they play the part so be prepared for all that entails.