We stayed in the apartment for a week with four people and we had a lovely time. The location of the apartment can't be better. Everything is within walking or cycling distance. The terrace is ideal for breakfast, lunch or hanging around with a drink and a book. For five people the apartment might a bit too small - one of them should then sleep on the sofa in the livingroom. There is no elevator and the apartment is on the fourth floor - that was no problem for us, but could be something to bare in mind.
We had a private pick-up arranged from the airport and that worked out great.