The apartment is very nice, relaxing and confortable, just 2 metro stops from the old city, or a 10 minutes walk. Close to the apartment there are markets and restaurants (cheaper than the ones you can find in the heart of the old town!).
The apartment is very clean, and well furnished.
I would reccomend to anyone this solution to spend some days in Prague.
Petr has been very nice and helpful in giving us all the needed information.