I had a great stay at Guillaumes apartment, I travel to Paris a couple times a year & will now always try & stay here.
The apartment itself is really nice & comfortable & very well designed. The bed was incredibly comfortable & I had the best night sleep i've had in Paris.
Guillaume himself also could not of been more accommodating & he went way out of his was to make sure I felt comfortable & at home during my stay.
I can't recommend highly enough.