No worries. I just stayed in the highest-rated one on Hostel Bookers, the Baxpax Downtown Hostel Hotel. It was fine - large, clean, central, with a bar etc., but I wouldn't recommend it because for me it didn't have any kind of buzz.
Plus I had my worst experience of the whole trip there. I was in a lower bunk - on the first of my three nights the upper one was empty. After the second I introduced myself to the girl above me, giving my name and offering my hand. She shook my hand, but just said Hi in the coldest way imaginable and didn't give her name back!
Still, it's an interesting concept, in that part of it seems to be properly a hotel, i.e. with a parking lot and some older guests in the bar. And if I needed somewhere, it would be perfectly fine to have to stay there again. I wouldn't stay in the large dorm (the K-studio) again, though. It is in the basement (presumably K stands for keller) and only has daylight through skylights covered in matting. It didn't have proper artificial light either - just red like a brothel. This is presumably so as to not wake people up, but it was so annoying having to go into the shower room when I wanted to check my guide or something!
list of good hostels in Berlin: rail.cc/en/berlin/accommodation/c" target="_blank">rail.shop/bookingcom" target="_blank">rail.cc/en/berlin/accommodation/c
Booking of hostels here: [ux]rail.shop/bookingcom or rail.shop/hostelworld