A hot mess...the flat was pretty gross when we arrived: a used towel in the closet, a dead bug on the dinner plate, hair in the cutlery drawer, the fan was very dusty, and towel/sheets/sofa are all stained. Luckily there was a washing machine and dishwasher so we could give everything a clean as we didn't trust that it had been done. The building itself is smelly and filthy, but I think that's outside of what the host can handle personally.
Aside from that, the flat gets *very* warm due to large windows that mostly don't open (one window cracks a couple inches). In late May it was bad, but I imagine summer would be unbearable.
The WiFi was great, though and the kitchen and laundry are good.