Hassania's place is in a great location, not far from Montparnasse station and the Bus that goes to the airport. Be warned, however, that due to many constructions in the area, lugging your luggage on the broken and uneven footpaths takes a long long time if you have a lot of luggage and aren't super strong. There are supermarkets and bakeries nearby which is handy. The kitchen is well stocked with all the cooking and eating equipment you would need. The bed is a bit too soft for my liking but is probably ok for other people. The shower is hot and strong.
She was very hospitable and the apartment is exactly like in the photos. She let me keep my luggage before checkin and after checkout which was very nice.
The issue I had were the stairs. I had asked if there was an elevator and she said Yes, however it's so small that you and the luggage cannot fit inside at the same time, and you need to actually climb 14 steps before you even reach the elevator, which is a hard task if you've got big and heavy suitcases and aren't a strong person. She did help me but it would have been better to mention this in the listing or mentioned it to me in the conversation as people should be aware of this. The lift is essentially pointless given how small it is and needing to climb stairs anyway.
Also, as the apartment is located next to a primary school, it is very noisy all day until about 6pm so if you want to have a nap or do some work it can be a bit difficult.