The flat was extremely clean, the bed is very comfortable, a strong warm shower and the heating worked perfectly. Location-wise it is great (and silent!); around 15-20min to Old-town's centre but it is a nice stroll anyway. There are many mini-markets, supermarkets and stores nearby, and 3min away to the Opera House, National Museum, tram and metro and 15 min to the TV tower.
The communication with Anna/Adam and their team was excellent before and during my stay, with very quick turnarounds and an easy check-in/check-out process, although I reckon checking-out at 10:00 AM was a bit too much.
The welcome wine bottle I received from them was a nice tasty treat.
I'd stay there again for sure.