Pavel is probably the nicest host I've met so far! He is welcoming, friendly, offers valuable tips and the oppurtunity to contact him any time... and the apartment is great, I would recommend it to anybody!
Even though the apartment isn't in the city center, if you take the metro, which is just 3 minutes away, you'll be in the old town within 20 minutes, walking time included.
There are really good restaurants in this district which I enjoyed even more than the ones in the city center. A good supermarket is also around the corner, just a 4 minute walk away.