Would recommend to friends visiting Prague!
The flat is in a perfect position: close to the center but also public transport if you don't like to walk. The host(s) is very kind and will give you indications and tips about your stay there, she is always ready to help you with check-in and other stuff. The place is really nice, the only downside is the big road right under the windows: with the windows closed no sound passes through, but if you have your windows open is kind of annoying. To be honest, I live in a very quiet place and I'm not used to city noises, maybe people living in city centers won't even notice what I'm talking about.
Last but not least: the place is really close to a good Italian-style coffee bar! it saved my day several times :D