We spend a spontaneous night at Ondrejs place and where more than happy with our choice. Not only was the booking absolutely easy and stress free, but the apartment was as described. The place is just next to the Wencels place right in pragues center. Very convenient! Although it's right in the center with a team station infront of it, it's totally quite in the apartment and you won't notice, that you're in the city centre. We enjoyed our stay very, very much and would come back any time.
Ondrej is very nice and offers tips for the city.
You'll find everything you'll need in the apartment, even coffee... Pretty neat and lovely.