Dan is a wonderful host and the apartment is great. Air conditioning in each of the three main rooms worked well, and helped to drown out some of the noise from the street (which you could only hear from the front bedroom). Note that the apartment is a walk-up (approximately 35 steep steps), which made bringing up suitcases a little tiring, but otherwise was fine.
My only complaint has nothing to do with the apartment (which is lovely!) but the neighborhood. There are a lot of bars and restaurants nearby, and bar patrons often sit on the front stoop to the apartment and drink. If you get up in the morning before the street sweepers arrive, the sidewalks and streets are littered with cups, limes (from drinks) and sometimes other food trash. The city does a great job of cleaning up by 9 am every day, but still a little gross if you leave before then.
I would definitely recommend the apartment to others, particularly younger couples wanting to be near the nightlife!