Big and clean apartment, about 10/15 minutes walking to the old town square. Wifi was good and there was always hot water for a shower. Plenty of kitchen utensils and the beds were comfortable.
The office to check-in is about a 15 walk from the apartment, but apart from the that it was a nice experience and the receptionist was very helpful with recommendations of things to do in Prague.
The door between the two rooms is glass so not much privacy as you can see in, which is fine if sharing with close friends or family but could be awkward.