Conclusion: Cheap place in a good location but with some drawbacks. You get what you pay for.
The apartment is OK. One room doesn't have any windows, the apartment is in general cheaply refurbished but convenient (has a dishwasher and washing machine). The road outside is really loud, since the windows are quite old.
In the staircase there are signs saying "Airbnb not welcome", which is in line with the general un-personal experience that you get from this host.
It was at a good price, but next time I'll look for something more personal.