My friend and I had a fantastic stay at this lovely flat in the Marais. We were greeted by Cedric who was a great help with getting our luggage up the stairs. He showed us the ropes and was an all-around charming guy.
The building seemed very safe and secure, which was important for two women traveling alone. The the location was ideal -- close to countless boutiques and cafes. The shopping is unparalleled -- everything from haute couture to vintage.
The flat is close to a couple of subway stations making it easy to get around the city. The washing machine was a great convenience after traveling for a couple of weeks. Also, the location of the flat within the building makes it very quiet at night -- no street noise seems to get through. This was a godsend after long days wandering the streets of Paris.
I would highly recommend staying here -- the only caveat would be that if a person has balance issues or is not able-bodied, they would have difficulty accessing the lofted bed area. There are other options, however -- the couch is a flip bed and there was a mattress in a storage area that could easily have been set up in the living room if needed.
All in all, a great stay in Paris!