Mark was a great host and sat down with us after we arrived to give us a brief outline of where to go around Prague. The apartment was spacious, clean and well-lit and the location was very convenient - only a 10-15 minute walk to the Old Town.
The only thing that I'd possibly want to point out for future travelers is that the water boiler can occasionally make some weird sounds that might startle you at night. (But even then its not so bad!) Other than that minor issue, I thoroughly enjoyed my stay at this apartment. Thanks Mark!