I don't think anyone could ask for a better place to stay in Prague - on top of the excellent location and the gorgeous flat, Sarah and Jan are communicative and welcoming hosts, with lots of recommendations for places to eat and things to do.
The flat itself is even more beautiful than the photos show - it's a light, airy space, beautifully decorated, with lots of thoughtful touches like USB plugs and everything you could want in the bathroom. (The shower is great as well!) Jan and Sarah kept in close contact before and during our stay, and helped make the trip fantastic!