I don't think you could ask for a better location than Mark's apartment in Prague. You can easily walk to Old Town, New Town, and Lesser Town. The apartment itself is very spacious and clean. There was a miscommunication with directions to Mark's apartment, for which Mark was extremely apologetic. Mark was kind enough to give us a map of Prague and note points of interest, restaurants, etc. His best tip was the free walking tour through Prague- if you have a short amount of time in Prague and want to see the main sights and learn some history, I highly recommend this.