First of all, Josef is such a considerate landlord who offers detailed instructions about how to get to the apartment, best things to do in town, nice restaurants nearby and flexible terms about checkout.
The apartment itself is in a central location in the old town and most famous spots are within 10-minute walking distance. The apartment is best fit for travelling friends and offers cooking possibilities if you are tired of meat meat meat in Prague restaurants.
In summary, don't miss it.