We have really enjoyed our stay at Guillaume's place. It absolutely corresponds to the description, the view is amazing, the cleanliness is exceptional.
Besides,
- the apartment was very quite, we haven't heard ANY noise from the neighbours, unlike in other places we have stayed previously in Paris
- the mattress and the bedlinen were comfy, there are black-out curtains in the bedroom
- we have absolutely liked the area, it's just steps away from Rue des Martyrs, with many nice small shops (cheese, fish, wine) and boulangeries
- If you are travelling with a child, there is a lovely carousel just 100 meters away and a couple of nice playgrounds in the near.