This place is awesome--quiet a gem!
The host is very helpful and accommodating. We stayed with 2 small kids ages 4 and 6 and the size of the place do not feel cramp for our family. The location is close to everywhere including Gard du Nord station which was a treat because we had to visit London mid our stay.
In addition, there are a lot of great restaurants and market (all walking distance) from this place. It is accessible to all public transportations which made our exploring around quiet easy. The only drawback is that this unit do not have an elevator. If you have heavy luggage this could be an issue. For us it is not a bad climb up as we only have carry ons for our family. Overall, this place and the host are worth more than 5 stars.