We went to Berlin for a weekend and stayed in Gal's apartment. The location is cool, the apartment is very hip and the local tips were really helpful.
The only 2 problems that we had were that when we got to the apartment nobody opened the door so we had to "sneak in" after a neighbor (it was like 1am so we were lucky) and that the people next door had a house party from 3am until 8am on Saturday so it was hard to sleep - they kept on ringing our doorbell and being noisy in general, which was a little unsettling (We know that's not Gal's fault but just so you know in case you have sleeping problems).
Overall it was okay!!! And Berlin is a lovely city