First of all, the location is just perfect - 15 minutes from Notre Dame, 5 minutes from Gare de Lyon (all trains and the metro), 10 minutes from Bastille.
The apartment itself is very clean, well equipped and the beds are good.
Highly recommended for 2-3 families who want to discover Paris and have some pleasant time in the evening in the beautiful Cremieux street as well (in the evening it can be a lot of fun too).