We had a great time at Karel's flat. He was the kindest of hosts and we immediately felt welcome : he was happy to give us information, was flexible with the schedule and very friendly. The flat is exactly as promised, the beds are comfy and it's pretty big for the price. It's close from the city center, not at a walking distance but there's a bus, a metro and a tram so it's very well connected. I would definitely recommend for a family or a group who want to visit Prague, as we were. Thank you Karel!