Christians apartment is really comfortable, just right for one or two people. The kitchen is great if you like to cook, ideal for a longer stay. The milk, orange juice and champagne he provided was really thoughtful too.
It is very close (right around the corner) from the metro, shops and a few mins from nice bakeries. I recommend the Petit Parisienne for lovely croissants!
The Arts et Metiers museum nearby is well worth a visit and it's 10 mins to Pompidou and 15 mins walk from Notre Dame.
The greeter who met me was friendly (Christian was away),if a bit quick showing me around the flat. Otherwise my stay was lovely and the area felt safe as solo traveller.
I would love to stay again as this was a great base for my stay in Paris!