Vitezslav is a very warm and helpful host! His apartment is in the heart of Prague and very nice, although crowded (but this can be seen in the pictures).
He offers a refund after check-in, which is great!
While check-in and -out were easy, it isn't that flexible as every hour after regular check-in and -out costs one euro, even if you simply want to leave your luggage so you don't have to carry it around Prague all day. It also seems kind of weird as Vitezslav stays in the airbnb himself, so it doesn't seem like an extra effort to check guests in. While this is not a big deal, we didn't see it mentioned anywhere before arrival, and were only asked when we would arrive the day before our trip to Prague, when we couldn't change anything about our trains.
All food in the kitchen is free to use, which is great, but we had a misunderstanding as the drinks are most certainly not.