Apart from the excellent location everything was bad for us.
The house is not the cleanest. There is a huge stain on the carpet and lots of mosquitoes. We arrived in a very hot week and no air conditioning in the apartment so we had to open the window, which caused more mosquitoes to come in.
A few meters from the house there is a school and the children are noisy from a very early hour. There was also a terrible noise of renovations from one of the apartments in the building.
The communication with the host was bad. The front door of the building did not open for over half an hour and we sent a message to the emergency number - they answered after 4 hours!
The front door of the building does not open easily and at every exit we feared that the door would not open when we returned.
Check-in was a bit cumbersome, you have to go first to the office which is 2 blocks away, take the key and then get to the apartment. Very uncomfortable to carry with luggage on Prague sidewalks!
In summary, not recommended.