DO NOT stay here is my recommendation!
Jan charged me about the same price a taxi would have to pick me up from the airport (you can take a bus from the airport to the subway for about $2 American), and his english is limited.
The apartment itself is in a good location (near the train station and St. Wenceslas Square), but the apartment itself needs work.
There was NO SOAP, NO SHEETS! I slept on a mattress protector that was spread over two twin beds. The blankets were two thin twin blankets. The bed made me wish it had come from Ikea because it was so uncomfortable (you could feel the individual wooden slats through the mattress).
I've stayed in better hostels for less money, and there are plenty of hostels in Prague (Prague itself is phenomenal).