The place was nice, clean and quiet. The bed was comfortable with clean sheets. I didn't get a chance to use much of the common area, mainly because of the amount of time that I spent there.
I didn't get a chance to meet Isaac, but he was prompt in replying to all my questions before and during my visit. I met one of his roommates and he was really helpful, and kind enough to give me directions, and couple of recommendations regarding the neighborhood.
Black's beach is around 15 - 20 minutes (walking) from this place. There is a cool winding road that goes through the cliffs which takes you down to the beach.
I highly recommend this place for its prime location and proximity to UCSD and the beach. Isaac seems to be a great host!