Definitely fine for a family of 3 traveling together, but would not recommend for 4-5 due to the limited space. 2 couples MIGHT be ok if you're comfortable getting cozy and pack lightly (which our group did).
We had some issues with there being a lot of dust as it seemed like there may have been some recent remodeling that was still being cleaned up, but Anna was very responsive to the concerns we expressed and promptly sent someone out to clean again.
Excellent location in Le Marais, very close to transit, so overall a good launching point to see all Paris has to offer.