Advantages: The location is perfect!! You can get around by foot everywhere. Communication with Mark was quick and easy and his English is very good.
Disadvantages: No bathroom door; no air conditioning (only a fan); very noisy sounds from the gas heater in the bathroom and it had no lid below, so you can see inside; broken shower (Mark gave us another one afterwards); uncomfortable mattress; bad check-out experience
Nevertheless, the most important thing for us was the location and we had a great time in Prague.