The flat was perfect for our needs - a quiet and safe place to lay our heads at night. Yacine has the place stocked with everything you would find at a hotel - linens, towels, soap, iron/ironing board, etc.
There is total privacy in this 4th floor flat - the landlord Yacine does not live in the building. However, Yacine always responded within minutes when we texted him.
The Alesia neighborhood is a good walk to Montparnasse, so is not centrally located. But that was a positive thing for us, to be able to get some separation from the city bustle each night. The Metro is close and gets you to Historic Paris in less than 30 minutes.
Also, if you are arriving bus CDG airport, the RER "B" line runs directly from CDG to the Denfert-Rochereau train station, which is walking distance to Yacine's flat. That saved us a €75 taxi ride each way.
We highly recommend Yacine and his flat. We would not hesitate to stay there again.