The appartment was great, it really is the typical parisian flat :) and it's only a few steps away from the Ile Saint Louis, so the location is more than perfect!
Sophie was very kind and offers you a lot of information and maps, if you don't know Paris, which can be quite handy for people that visit for the first time.
Everything worked out great, she met to give us the keys and explain everything in the apartment, check out was also easy: we just dropped the keys in the mailbox.
We definitely recommend to stay at her place :)