Jan's flat in Prague was absolutely perfect for our stay, it is really close to the city center, we didn't take the tram once because we walked along the river every morning.. Around about 15 minutes to the centre if town by foot!! Jan and his mom spoke English and German and helped us out with everything we needed, they drew maps for us and gave us tips on where to go and where to eat out etc.
The flat was basic but has everything you need for a really comfortable stay..I would absolutely recommend their apartment for a great stay in a great city!!