My girlfriend and I stayed for a long weekend during December so that we could see all the Christmas markets and I'm so happy we stayed in the flat. Communication before arrival was amazing, and when we arrived we received a really prompt response when we had an issue getting into the flat (entirely my fault for not reading the message properly).
Once in the flat, we weren't disappointed. The bedroom/living room is very spacious and the bed was incredibly comfortable. The bathroom is huge and the shower had great pressure and was very refreshing. There is also a really nice little courtyard which was a great place to sit in while having our morning coffee.
The location is superb, within 5 minutes there was a lovely little square outside a church with some great little stalls. A 15 minute walk away from the main train station as well, and 20 minutes from the Old Town square, which was amazing. There are also lots of nice bars, restaurants and a few lovely brunch spots within a 5 minute walk. That being said, it was really quiet and we both managed to get a nice lie in the mornings! (something we rarely get at our flat in London!).
I can't recommend the flat and the hosts enough and if we come back to Prague, we'll certainly be looking to stay there again!