This is a great apartment - clean, comfortable and well-located. The beds are good, there's plenty of hot water, the space works well and we had a very happy 10 days stay. The walk to the near-by subway is safe and quick- there are some local shops for groceries, and it's easy to get to the rest of Brooklyn and Manhattan.
The apartment is even nicer than it looks in the photos - and as everyone has said, Markus and Andrew are helpful and on-hand if needed.
All in all, a very good base for a New York City adventure.