Me and 3 friends had a great stay at Dirks flat - it was exactly as described. There was construction work on the other side of the street but we didn't notice it at all because the very well isolated windows.
We were welcome by a nice girl from an agency who gave us a good walk through the flat and all its equipment.
The flat is perfectly placed near the tube - I can only give my warmest recommendations.
We will definitely use the flat again.