Room, location and cleanliness was perfect. However, an additional towel could have been provided, since there were only two towels in the room.
On the other side, we were very dissatisfied with the service provided. First of all, the booking confirmation stated that the reception of the apartments is at another address (Walonska 7/1 Street), which is on 15 minutes walking distance from the address of the apartments. At the address stated, there was only one receptionist available. We had to wait about 30 minutes until we were finally helped. Then the receptionist told us the reception is not at the Walonska Street and sent us back to the third floor of the building where the apartments are located (and where we just came from).
After arriving at the actual reception, we told the receptionist that we had been walking and waiting for an hour, because there's an error in the confirmation e-mail. When we told her that, she just laughed and continued the check-in without even apologizing, which was quite rude.
Concluding: nice apartments, although really unfriendly service.