The place was really nice, a family house, clean and spacious. Quite stocked kitchen so we could cook most mornings and the place has washer and dryer so if you're short on clothes it doesn't matter :). Well located between two tram lines (5 min walk) and a bit further (maybe 15 min walk) a subway station so easy to come and go to the center. Also some convenient stores or places to eat 2-3 blocks away.
The only downsides I would recall are quite common around the country: No AC/fans (there was a heat wave during our stay so check the weather), and no elevator (the flat is on the second floor) but, as I said, I think I haven't been in a Czech flat building that has one. I thought it is worth mentioning because maybe for some the access isn't easy.