We had a great weekend and staying at S&M worked very well.
S&M are very nice and easy, they were very communicative and flexible with check-in and check-out.
The flat was really tiny which didn't bother us except for the toilet which feels a bit too tiny, but the flat was equipped, clean and nice.
The location is convenient, although I would have liked to have been told that it is in a kind of red light street, however we had no problems and it is full of nice places one street away.
Overall it was very good for us!