Overall, we were pleased with the flat and it's location. I think they could do a better job of communicating prior to arrival of where to go. It was very unclear and we ended up going to the wrong place. It ended up being okay because it was only a 7 minute walk, but after a very long trip to Prague and the need to lug our suitcases over the cobblestones, it would have been nice if we had just been at the right place to begin with. We did get a text from Alex upon arrival, but it didn't come through right away due to our mobile services not clicking in right away. So...I would strongly recommend direct communication from Wishlist explaining where to go.
The flat itself was very large and spacious. It was clean and in pretty good shape. There was some water damage in the bathroom above the shower (assuming the people above) and it leaked a little bit one day, but other than that the place was good.
The location where we stayed...Jachymova 4...is a great location, but was a bit noisy with all the stag do's going down the street on bicycle bars during the weekends. It wasn't horrible, and it was kind of funny, and it didn't last late into the evening.
All in all it was a good place to stay and I would recommend it for folks that want to be super close to town square, have a lot of space and their own kitchen, washer/dryer, etc.