Roman's place is one of the best Airbnb's I've stayed in. It's very close to the old town square (<15 mins by walk), and has a tram stop less than 2 mins away.
The neighborhood is really nice with a lot of cafes, restaurants, bars, and a supermarket (Tesco) all within 5 mins from the apartment.
The check-in and check-out process were a breeze. Roman also provided thoughtful touches like espresso pods, beer, and coke with an honor system of paying for the items you use.
When I wanted to figure out how to turn on the heater, I messaged Roman and got a response within minutes. If you're visiting Prague, I highly recommend booking Roman's apartment.