The apartment is amazing - even better than the photos make out! It's very spacious and has everything you need, including a great Italian restaurant right opposite!
Sandrine was very helpful and we had no issues at all. It's in an amazing location too - very close to a couple of Metro stations and Bastille. But residential enough to still feel properly Parisian.
I would definitely recommend staying here to all types of travellers. It's definitely at the top of my list of places to stay when I visit Paris again - loved it!
(Small side note - for those with mobility issues, there are no lifts in the building and it's on the top floor)