It's a small apartment but if you want somewhere to sleep and eat in occasionally, it's more than enough.
Timnad was a SUPER host, very helpful and answered very quickly. It was very nice to have the option of the late check in, since our flight arrived at night.
The area is nice and it's a quiet apartment, with the added bonus of the pool (even though we didn't use it). Don't forget to at least check it out and go to the solarium to enjoy the view of Paris at night (Eiffel tower included, we went the last day and if we had known that, we wouldn't have fine to Montparnasse tower, it's almost not worth it having this option for free).
The only negative thing is that the bed makes some noise when moving while you sleep, I hope that this can be fixed. The mattress is not the most comfortable, but well, you never sleep anywhere as good as at home, so it's difficult to compare :)