If you're thinking to stay here, my advice is to definitely book it.
Firstly, Emma is an absolute doll. She was super flexible with my check-in, gave great tips for local places to eat & also held onto my bags while I wandered around Paris on my last day. The apartment is fab too! Top floor so some great views & there's a little balcony.
Secondly, the flat is in a quirky location! Bastille is a super cool area. There is all sorts of everything just on her street. Restaurants, cafes, shopping, comics, records, costumes... You could occupy a few hours just checking out everything on the one street. And it's also next to Le Marais where there's even more great shops & restaurants.
And thirdly, well, it's the right thing to do. You won't regret it. :)