I spend only one night at Greg's place since I was traveling around Southern California with my mother and brother and we did not have that much time in San Diego. That said, our time there was great. Greg provided everything we asked for, the place was clean and welcoming.
He also had good recommendations for food locations, which does not hurt. I am not very familiar with San Diego so I feel I cannot really tell, but I definitely felt in a convenient location to visit the main spots of the city. Recommended!