We loved our stay. The apartment was just as it looks in the photos. It was quiet at night, which was wonderful. Very convenient to the metro. However, this is not a particularly appealing part of the Marais.
Beds were comfortable. Plenty of linens. Wonderful light. It would have been nice to have better amenities like nice soap but there are stores a few blocks away where one can purchase all this, and food shopping is also convenient.
It is not a touristy street/immediate area. In this immediate neighbourhood there are mostly Chinese import stores with lower end goods, not the cute boutiques and lots of cafes and restaurants that one finds in the central part of the Marais. We don't mind walking but someone who wants more right outside the door might prefer a different location. Having said that, Paris is compact and nothing is too far away.
Check in is self serve but worked out well. However, be aware that there is only one key and no other way to get in so unless you come and go at the same times, this could be a challenge.