Nice, luminous flat in a pleasant neighborhood. Excellent, prompt communication with the host throughout. The apartment was perfectly clean as we found it. The apartment is only a stone's throw from Stromovka Park and Letna park, where one can enjoy a sight over the city and a walk to Prague's castle. Public transport, as well as cafés and restaurants nearby - for Czech lunch in a local pub, Stereo is an option; great (and cheap) northern Chinese noodles at Chang'An, both just around the corner.
A minor downside perhaps, if one is to mention anything: for longer stays, the bed might not be the most comfortable, but hardly to the point of spoiling your stay.
To be recommended.