We just stayed two nights in the flat and were only there to sleep. Yet we noticed that the walls are very thin and you could hear every noise from the neighbours. The mattress on the bed was alright but not the most comfortable.
We didn't use the kitchen but everything seemed to be alright and functioning.
The sink and the shower in the bathroom were clean (although the rainshower-function didn't work correctly and there were some paintsplatters on the sink) but the floor looked really surf