Katia's place is a mixed bag. The location of the apartment and the price you're paying are good. However, the communication and check in process is not.
To start you are required to message someone else through your private number so they can arrange for your stay. I prefer to keep all communication in the app so this is already not great. The check in process itself is unnecessarily long and can definitely be streamlined. There is also some mention of paying extra if you check in after a certain time so be wary of that.
The place itself is good but there are some issues. As other reviewers have mentioned there is a smell in the bathroom, I can confirm this is definitely the case and it is noticable. You'll have to keep the bathroom door closed to keep the smell only in the bathroom. It seems that it might be a building issue but nonetheless it will affect you.
The place lists it can sleep 4 but it would be very tight for 4 people. Additionally the hot water tank is very small and we were struggling with just 3 people.
Overall I'd say this was an average stay. The value is good but there are definitely little things that you have to worry about that you probably dont want to when you are trying to enjoy your vacation.