A bit rude but on the plus side they stay out of your way.
Wildly expensive if you're looking long term. (I had to pull the trigger under time pressure.) These people are real estate speculators running a 10 unit operation city-wide. They got in when it was cheap and are looking for money. This is not your typical unexpected extra room AirBnB mom and pop. It's a shadow hospitality AirBnB business where you are basically an inconvenience to the "hosts".
The pipes backed up twice, October 27 and 28, sending other people's shitpiss out the shower drain and into the bathroom. Alan told me I was "unlucky" and gave me 2 beers. Apparently this had been going on for 6 years (water damage to the woodwork was consistent) but the Wohngemeinschaft wouldn't act because shitpiss was *only* a problem in this ground floor apartment. After it was "fixed" the shower drain continued to fart droplets into the shower area. You can count on that being a thing during your stay.
They advertise wifi. You will be sharing Alan and Kasia's private wifi network from their apartment. Kasia said the wifi was only 2 meters from the kitchen, but this was through 2 load bearing walls. Unless you expect to do all your internet from the kitchen, the signal is not good enough. From the bed I was getting 730 Kbps on my phone. I was unable to make facetime calls anywhere in the apartment. This was in winter during Covid when there were travel restrictions and I think the hosts were lucky to have me for 5 weeks. But I was there to do Zoom meetings, not sightseeing.
I constructively suggested running my own Apple network from their router, which I could then boost inside the apartment. Kasia said "we have had bad experiences in the past with boosters in other apartments." But we tried it. Alan then said "Look we provide a connection any nobody else has a problem. We have tried your connection but it just doesn't work." I don't think these statements are consistent and one of them is lying. They've had complaints in the past and they don't want to do anything about it.
I asked what their theory of the wifi problem was and they didn't have one. My theory is that they are happy advertising wifi and saving a buck by letting tenants use whatever bits leak through the walls while they enjoyed the highest speeds. As soon as you extended the wifi network, and get fair access to the internet bandwidth, Alan and Kasia complain it is an inconvenience to them. Alan has zip files to upload for his day job. They shut you down because they feel entitled to your 1500 euro rent.
I have to say even more than the shitpiss in the bathroom, the wifi issue was the biggest insight into Alan and Kasia's character. These people are not your friendly mom and pop extra room AirBnB operators. They are exploitative real estate speculators–10 properties city-wide–in it to extract money from you. Look elsewhere.