I spent a wonderful 4 nights at Jan & Sarah's place. The space is very thoughtfully laid out and they go above and beyond by providing plenty of toiletries, some kitchen essentials, and local guidebooks. They've created their own city guides that they sent before I arrived, which proved to be VERY helpful--great restaurant recommendations! The location is great, on a quiet street near the river but only a 15-20 minute walk from the center. I would definitely stay at Jan & Sarah's place the next time I'm in Prague!