We stayed at marks place for a weekend and couldn't have been happier with the apartment! it was a nice, clean flat with enough space to feel comfortable and like home. we managed to walk from the apartment to all the main places in prague. mark gave us some good advice on vegetarian restaurants and were to hang out in the evening or were to have a nice beer. I can only recommend to stay in this lovely decorated apartment when you are in town for a few days, it is definitely worth it :)