I find each hostel has a personality. Singer is generally quiet, so you won't see huge party crowds in its common area, but it's nice if you actually want to sleep at night. Visually it's one of the better looking ones I've been at in Berlin. Everyone working there is cool and will be happy to chat if you come in at 4am. I would recommend it, especially if you are with a friend or are ok with going to a pub crawl or meet up to make a few.