Ondrej was a very nice host. Before our arrival he contacted us very frequently and tried to inform us about everything necessary. He did the check-in in person and showed us around. Also he provided us with the most important information regarding sight-seeing and where to buy groceries.
The apartment itself is located very central but yet very quiet. It is atmospheric and cozy. It has enough space for four people. The beds were very comfortable. The heating worked well so we weren't freezing. Groceries can be bought in a discount supermarket next door. The kitchen could have been equipped with some more things e.g. a coffee machine. Also you should be aware that the folding door in the bathroom offers not that much privacy when it comes to sounds. But Ondrej said that they're working on a second bathroom which will probably eliminate this little inconvenience.
All in all the apartment and Ondrej as a host can be recommended to anyone who would like to experience Prague first-handed.