The flat is exactly as described in the post. Just wanted to add that it's a room inside of the building entrance, the windows open to inside of the building, so not a lot of light comes in. As other reviews had stated, it can get noisy in the night, but I brought my earplugs so I was fine. Finally, the 40-litre water heater translates to 10 minutes, so don't take long showers!
The location is good. Good option for short stays or for when you don't plan to spend a lot of time in the room. If you plan to stay at home and do work, there is no proper desk or chairs to sit for many hours without hurting your back. The WiFi is good and there is heating and air conditioning.
The good: it's as described, and they left me coffee and sugar so I could make breakfast. Check in is until 20:00, unfortunately COVID has reduced flight availability, and the only flight I found arrived at 22:00, but the host sent his wife with the keys. She also came for the keys the day I was leaving.
The bad: They only left one roll of toilet paper, I stayed there for 8 days so I ran out of it and had to find a solution. The host and his wife asked me for an extra 20 euros in cash because I arrived after the check-in deadline (20:00 at the moment of writing this). They didn't make this money payable through Airbnb so I had to give it from hand to hand, so be aware of this if you arrive after the check-in deadline.