Great location but few bathrooms.
Excellent for the price, but it is more of a hotel than a hostel. It is a little out of the way, but you can still easily walk to everything. I ended up in a 4 person room by myself for the two days that I was there. Wifi works well in the rooms. The staff were friendly.
This is definitely a hotel, not a hostel, that lets you split the cost of your room with a few strangers. Wifi works well in the rooms, but the kitchen and fridge is far away from everything. Berlin requires taking the metro to get everywhere anyway, so the location of the hostel matters less.
The staff was excellent. They put up with my arriving early (there is a time difference between Spain and Portugal) and were happy to store my bag while I went exploring. They were helpful in answering questions. Very clean, but there could be more bathrooms. Also a bit of a party hostel and lots of stairs to get to the top floor.
I was very happy with my visit. The hostel location was perfect and the staff were good at providing suggestions for sites I could see that were not super touristy. The other guests were respectful and friendly. I liked having a kitchen and it was cleaner than my dorm suite.