Our stay was great. Joel's place is conveniently located close to UCSD, it has a good number of stores nearby (Whole Food, CVS) and restaurants, and it's a 10 minute drive to La Jolla Shores. The neighborhood is also very quiet and well maintained.
Joel's place is a townhouse, with 2 bedrooms on the second floor, living and kitchen on first floor. There is a lot of space. We had no problems, everything worked fine, Joel gave us some tips on restaurants to visit and was always available via whatsapp/text messages.
Overall, we had a great experience, and would definitely stay there if an opportunity arises.