We had a great stay! Apartment is very specious. Small elevator in the building was a great plus if you have bigger luggage as this apartment is on top floor (4). It is in very convenient location in terms of places to visit, restaurants and public transportation. There is a small market right downstairs which is ok for quick pop in. If you can walk three minutes around the corner, Zabka market (Potraviny u Havelku, Kaprova Street) offers great selection of everything (fresh morning bakery goods too) and pleasant service.
Lukas and Chiara were very flexible when we were checking in as we got stuck in winter traffic multiple times and made it in later than scheduled.
I would definitely stay here again and recommend this place to anyone looking for a place to stay while exploring Prague.