The apartment was comfortable, clean, in a fantastic location (above Dinitz Restaurant) in the old city, an easy walk to the historical sites, synagogues, and museums. The apartment had plenty of room for two people, or three if one sleeps on the couch. I'd easily stay here again when I have the opportunity to return to Prague. The staff in the rental office across the street were so helpful, providing maps, bus, and local information, and even subway fare! I was 20 czk short on my last day in town for the train to the airport and one of the clerks gave me the coins so I wouldn't have to exchange any money!
My apartment was on the first floor, which required walking up seven or eight steps to access.
The only odd thing was that the wifi didn't work with my android phone, but thanks to the restaurants downstairs and across the street, I was able to connect. The rental office wifi worked fine on an ipad and windows computer.