Our overall stay was good and I recommend Katerina's space as a whole.
Advantages:
1) Allmost all of the amenities promised
2) Sparkling clean
3) Central location
4) Excellent communication with host and co-hosts
Disadvantages:
1) Heating wasn't working and the only source of warmth was the A/C which is not quite the same
1) House seemed bigger on photos and seemed to have rooms, when it's only 1 room with 3 beds and a sofa
2) Impersonal contact (too many people involved)
3) An entire booklet of rules (ex. how to drop keys)
4) Too many rules about the building
Unfortunate incidents:
1) Wi-Fi stopped working but the people involved resolved it within an hour
2) 1 out 2 elevators broke down and we were stuck on 7th floor upon checkout because the 2nd elevator wouldn't come up as the 1st was stuck.
The place is suitable for 2 people, a small family with 1-2 children or a business trip but definitely not a 5*. Pretty good though!