Overall it was an ok stay. However, communication at check-in wasn't great and me as well as some other guests had to make phone calls and wait (sometimes several hours) to be able to enter the building. Once we were in the hostel, communication improved though. Just make sure you establish contact about your arrival time beforehand!
The hostel is basically an appartment with one 4-bedroom and one 2-bedroom (all bunk beds). The common area and the kitchen are both tiny but fine. It's not really a hostel feeling with hardly any guests staying there. Generally the place was clean apart from the toilet which was only cleaned once in the 5 days I was there. The shower head was broken so water went all over the place but nothing was done about it. The internet didn't work for a couple of days and only upon pressuring that I would leave as I needed internet in order to work was the provider called and the problem fixed. The internet was then good. They take 2€ for a locker per day and they don't provide towels. Location is ok with a 5-10 min walk to the centre.
So yeah, generally there were some hiccups but at the end of the day it was an okay place to stay.