Charlotte's place is great. One of the larger Airbnbs I've stayed at in Paris - definitely felt larger in person than it seems in the photos. It's in a great location (13eme, close to the 5eme) and close to two metro lines (about 5 mins from the M6 and 9mins from the M7. Really easy to get to CDG as the RER B is walking distance (14 mins) from the apt., or 2 metro stops. Though, make sure to check there are no interruptions, as we nearly missed our flight on the way back bc of this!
Only thing I would point out is that the stairs to get to the apartment are very steep. It's just one floor, so much better than many Parisian apartments that can be 5-6 floors with stairs, and we didn't mind at all, but wanted to note this for anyone who is older or has limited mobility as it might cause an issue. Otherwise, we really enjoyed the place, it was very cozy, and we wouldn't hesitate to stay there again.