The location of the place is very good - it's about 10 min. walk from Václavské náměstí, there is a mini-market nearby, also fast food just across the street. It was very clean and the wi-fi connection is good. Mr Wathek is a kind and hospitable man, eager to help.
The thing that surprised me unpleasantly was the lack of hot water - I don't know what was the reason for that and I hope it's been just an accident. Also, it was very cold inside due to the unusual weather and the lack of heating but of course, one cannot expect to have central heating working in May. Mr Wathek was so kind to provide me with an additional blanket so it's fine.