This is a nice apartment for a short stay in Prague! We stayed for 2 nights, 3 people. We loved the building, amazing location and ease of check-in/check-out. The heating was easy to use and a great addition as it got colder at night in November.
The apartment is nice, though not as cosy as in the photos - some of the furniture is really old, the wifi didn't work and the tap in the kitchen didn't either. There's no shower mount on the bathroom wall so showering is kind of difficult, especially washing your hair. We only stayed a short while and didn't need to cook or work in the apartment, so it wasn't a problem but overall makes the stay less comfortable.
Aleksandr was very responsive and accommodating.