On the plus side, the location is very nice, about in the middle of Mission Beach, and there's a handy bus that stops right on the corner to take you Old Town, La Jolla, etc. The breakfast spot about 4 blocks away is great, as are some other nice eateries and coffespots/bars. Pacific Beach is only about a 30 min walk tops. The supplied beach towels, umbrellas, chairs, etc. are appreciated.
On the negative side, there were a number of issues that I have discussed with the hosts: sharp bed corners that cut my legs (fixed), a dysfunctional coffeemaker (not fixed), and most importantly, the complete lack of ventilation, so no "breeze" of any kind, making the unit unliveably hot from noon - 7 PM. There is a window A/C unit oddly in the kitchen which is not helpful. However, due to way the unit is laid out, a simple and inexpensive exhaust fan put in the bathroom window would draw in plenty of cool San Diego air to make the place very comfortable. It seems the hosts have a good heart, so if they address these issues, the unit could be a very nice choice, otherwise, no. Last item is that the bicycles are suitable for shortish men or women only. At 6'1'', I couldn't use them.