Me and my girlfriend had three lovely days in Prague. Kryštof's appartment was the perfect accomodation for our trip. It is in a very quiet area, but you only need about 5-10 minutes with the bus to reach the city center with the bus-stop right around the corner. The appartment itself was very clean and in a good condition.
Kryštof is a very nice and cooperative host, as we were able to check-in earlier and check-out a bit later and he responded quickly when we had questions. If you are planning to stay in Prague for a few days, I highly recommend you this appartment.