Visited whilst on a family trip to Berlin - we stayed nearby and this restaurant was recommended to us by a local.
Food was very good, service was excellent and location is great. Amazed how inexpensive it was to have dinner with wine for a family of 4
We sat outside on a very warm July evening which would have been very pleasant except there doesn't seem to be any smoking/non smoking segregation outside - a minor point and did not spoil our evening but worth noting if this is an issue for you.
Overall very nice and would recommend