Very nice apartament. Warm, clean and cosy. We even had a little garden att our doorstep.
The wi-fi didn't work though. But nothing we couldn't do without for one night.
The only down side is the difficulty in finding a parking place nearby. But we got really lucky in the end. After 5-10 minutes of circling the streets nearby... hallelujah... we got our own very very tight spot for lateral parking. At least it was free of charge.
Berlin is beautiful. Next time might be a longer stay.