I enjoyed my stay at Maggie's place. It's a nice apartment, the pictures are accurate, it's clean, has good amenities, and the bed was comfortable. The location is pretty convenient to UCSD, though not quite walkable. Maggie is extremely helpful and responsive to messages.
One thing that I wish the listing would clarify (perhaps it will by the time you read this review) is that this is a large apartment shared with possibly multiple other guests. In my case, it was three other guests - fortunately all headed to the same conference. But when you book, you should be aware that you are more getting into a dorm-like situation than "classic" AirBnB.