We have just got back from our stay at Robins Rooftop, there were 4 of us and the apartment was the perfect size. It was clean enough with a big bathroom and additional sink in the master bedroom. The only downside is that this is a 5th floor apartment and the only access is up a very steep flight of winding stairs, the 4 of us managed them no problem but they are steep!! Martijn offered to help us up with our bags on arrival and he let us leave our bags with him after we checked out so we could enjoy the time left before our flight, when we returned for them he had brought them down to the door for us. The apartment is about a 25/30 min walk from the centre and in a nice quiet overlooking the canal.