The apartment is in a great location to explore Prague by foot. The air conditioning is key, since many apartments in the city do not have air conditioning. I would say it is necessary for the summer months (just make sure you work it correctly, and don't put on the heat one night by accident! :) ). Josef was a great host with excellent communication, including providing many guidebooks and advice on things to do and places to eat in Prague. It is important to mention the apartment is on the top floor of the building (not too many flights of stairs, but no elevator for individuals who might need that). The apartment is quiet at night, with only one window facing the street - it does a great job of keeping out the noise. The bed is extremely comfortable and the apartment is newly renovated. I have nothing but great things to say about this AirBnB. I think it is better than other places where the apartment itself might be nice, but you might not have as much support or advice from the host.
We arrived late at night (10pm) which was no problem for Josef, who had someone waiting at the apartment to meet us, because we didn't have cellular or data service during our short stay in Prague. He was extremely flexible with checkout, and allowed us to leave our bags in a secure location for a few hours on the last day after we had already checked out.
Thanks for helping to make our 1-year anniversary trip great!