Luis is a very friendly and helpful man, providing us with clear instructions and directions.
The apartment was cosy and large enough to house the four of us (3 adults + child). There were two bedrooms, one with a bunkbed and the master bedroom with a twin bed. In de living room there's a sofa bed that sleeps two. With six people the place would feel really small though.
We didn't dare touch any of the books and audio/video equipment because some stickers explicitly told us not to :) But we were in Paris for other purposes so we didn't mind.
The location is nice and quiet, and easily accessible from Gare du Nord, once you manage to find your way to station La Chapelle that is.
The apartment building is right next to the cemetery where Jim Morrison is buried. So if you're a fan, pay your respects.

Will visit this place again!
Thanks Luis!