There are much better options in San Diego
I stayed at the Doubletree last week during a trip to San Diego. I'm in town quite a bit for work, but it was my first time at this hotel. A few things I noted:
1. Make sure you request a parking pass!! While checking in, I inadvertently forgot to mention I had a car (and was never asked). When I went to my car in the morning, there was a sign saying I didn't display a pass and my car would be towed if I didn't move it. When I ran to the desk requesting a pass they seemed like 'oh well, here's a pass.' There is no sign stating you need a pass, and I assumed you needed your key card to exit the lot but this isn't needed....They just come around and look for parking passes - so make sure you get one.
2. I stayed in 1703, which had a connecting door. Whatever you do, DON'T take this room. Can't say whether it was this specific room or whether all rooms in the hotel are like this but I could hear every breath the guy in the next room took. In fact, while laying one bed at night I found myself laughing at a joke that was on his TV! The connecting doors are paper thin and I don't think he was overly loud because I could hear every sniffle he took. 
Overall, it was a typical Doubletree. Staff was pleasant, but didn't go overboard and the room was clean. However, based upon my above two points, in the future, I think I'd pick another hotel that I've had better experiences at.