Singer Hostel is an awesome place to stay which is semi near to the center of berlin. It would be recommended that you rent a bycicle unless you dont mind walking to the main attractions this city has to offer.
Awesome rooms with pretty clean bathrooms. They have a small breakfast buffet until 11am for 5 euros. Consists of fruits, cereal eggs and juices. Pretty good combination to start the day. They also have a pool table and a rest area in the obby
The beds on the shared rooms did make a lot of noise when you moved even a bit. Also be aware that they rent you towels and padlocks. Not that is bad thing but sometimes people dont read or pay attention.
And the internet on the rooms is pretty aweful because the signal doesnt arrive properly. The internet on the lobby area is great but they close at 10 pm the computer area.
I met four interesting people in this hostel and hope to stay again another time.