We were 4 and stayed at Gabriel's loft for 4 days. It's a beautiful place, nicely decorated, very clean and well furnished, especially the kitchen. The neighborhood is calm and nice. Supermarkets and the subway are very closed.
The owner and Katja were very accommodating and allowed us to stay a bit longer after the checkout time. We also had a bottle of wine waiting for us and we appreciated the gesture.
We warmly recommend Gabriel's loft for your next stay in Berlin !