I can only say good things about this apartment and Andreas.
We booked it 2 hours before arriving, and the response was instant. No problem regarding the late booking and everything was perfect when we arrived.
Our motorbike was parked safely in the garage off the road and Andreas was there to give me instructions. The following day we had a car train leaving in the evening and Andreas was very kind and let us store our luggage until we were leaving. So we spent our day riding to the Wachau valley.