We had a great 4-night stay at Birdsnest in La Jolla. As other reviewers have noted, the views from the main room are truly spectacular. The kitchen is new and stocked (but missing basic seasonings), the living room is comfortable, and the bedrooms are adequate.
If you are traveling during the summer months, please be aware that this apartment does not have an AC unit. We arrived late afternoon on a warm but not hot August day. With the sun hitting the living room, the entire apartment felt like a sauna. We quickly opened all the windows and closed the shades to let it cool off, but the heat was, at times, unbearable. Thankfully, this is San Diego where evenings are significantly cooler, so we were able to sleep in relative comfort.
Jonathan was highly responsive and agreed to refund us for a big fan that we purchased on our second day. I would urge him to consider installing a unit in this apartment for the few summer months when the apartment becomes uninhabitable during the day. Otherwise, I would have given his place 5 stars.