There are two rooms in the apartment and a very small kitchen area.
The room is comfortable and the area is nice, just 20mins walking from the centre...
We did not meet anyone at the check-in but the keys were left in the safe-box.
They have been very kind to keep our luggage until late afternoon the last day, as we checked out in the morning and our flight was not leaving until the evening.
Overall a good solution and we enjoyed our stay in Amsterdam very much.
Should we come back, we will re-consider this solution.