I was in David's apartment with two colleagues, we were visiting Prague for a conference in the Prague Congress Centre. David was a very nice host, communication went very smooth and he allowed us to leave our suitcases in the house while we were visiting the city the last day. The place is close to the Congress Centre, but keep in mind that you need to climb quite a few stairs to get there since it is on top of a hill. The house is very clean and spacious, with a bedroom with a double bed and one with two single beds, a large living rooms with couches and chairs, bathroom with bathtub, toilet and a nice kitchen. We did not really use the kitchen but it seems that there is everything you need. The floor is in wooden and a bit creaky, not super ideal if you want to get up without waking up the other people. The place is not super close to the city center old town, but you can easily reach it in ~15 minutes by tram. Tram stops are very close. I certainly recommend David's apartment if you visit Prague and especially if you attend a conference at the congress center.