Following the check-in instructions was fairly easy (also recommend using Go0gle Maps and not Apple Maps).
The positives - The location was ideal, with the Charles bridge and Old Quarter only a few min walk away. The apartment is clean and the underfloor heating was a life-saver in the cold. The apartment is equipped very well which is super convenient for the light traveller.
On the down side, the bed is extremely squeaky to a point where it is uneasy to sleep at all. Another downside is the pillows, they need to be replaced - one simply cannot sleep on those - the inner padding is so uneven it feels like putting your head down on gravil-road. The other downside is that the apartment is on a somewhat busy-ish street, and you can hear every word if someone is within 15-20 meters from the windows of the room. Also, we could clearly hear the neighbours on both nights- recommend to close the room door.
Potential for this apartment to be 5/5 is extremely high.