I am really sorry to give a relatively neutral review but this place had some issues. I want to be fair so am going to point out the positives and negatives.
Positives:
Excellent location
Very large space with 2 separate bedrooms
Very reasonably priced
Although I just exchanged a few text with the host and met the mother for a few minutes they were nice
Although not my personal taste very unique artistic decor
Good Wifi
Negatives:
Bad smell of dust
Sheets and towels that were very old and hard
Very cold flat (there was heat but we could hardly feel it because there was a very strange hole in the wall that was meant for Ventalation but was letting in all the cold air.
Beds uncomfortable
There was an issue with electrical outlets. Very few were working.
As a final note, I think the host should either consider some very basic purchases (such as new sheets and towels. An extra heater, new inexpensive Ikea mattresses, etc. and a deep cleaning which might make this place more bearable. If not, perhaps mention all these points in the ad so expectations are managed.