We stayed here for about 6 weeks and generally had a great time, with a few minor caveats.
The good:
* Very convenient location right in the heart of all the bars and restaurants in the Gaslamp, with coffee shops, Ralph's and CVS all in easy walking distance
* The apartment itself gets lots of natural light during the day and has a cute balcony.
* The apartment was clean and well stocked
* David was always very responsive (usually got back to messages within minutes)
The less good:
* There was a noticeable cigarette smell in the apartment, presumably from a previous guest. This might have improved over the course of the 6 weeks.
* It's a fairly noisy location - I was prepared for nighttime noise since it's right by 5th Ave, but there was also a lot of noise in the early morning (trucks loading and unloading) and whenever there was an event at Petco Park which is just blocks away
* In the evening the apartment is very dark because there is no overhead lighting except in the kitchen - we ended up buying brighter LED light bulbs
Overall though we were happy here despite the bumps and would probably stay again when in SD.