We had a wonderful time in Paris, using Anais's place in the Marais as a home base. The apartment was exactly as described- fun, funky, great location with tons of neighborhood eating and drinking options near-by.
Anais and her sister were great communicators both before our arrival and during our stay. They helped us with transportation from/to airport and when we had a question about the wi-fi they were very responsive.
As noted in the description, due to the 4 flights of stairs to reach the apartment and the tight internal spiral staircase, this wouldn't be a great option for people who are frail or are not in good fairly good physical shape. These conditions did not slow our family of 5 down in the least.
Overall, a wonderful experience and we would happily stay here again.