Jan is a great host and the stay in his apartment was great! We had a perfect time in Prag. The apartment is clean and has a small balcony. The kitchen is equipped with everything you need, but don’t expect too rich dishes. You have one small and one large bed, so it is great for 3 people or a small family. The bathroom is comfortable and water gets hot quickly.
Concerning the location, I would say you should plan at least 20-25 min by foot if you want to walk to the tourist spots in the old town.
All in all we had a super nice trip! Very recommendable!