The Good:
The AirBnB was very spacious, well designed, and in an excellent location. Neighbors were quiet and it was easy to live and work from this place for ~2 months. Even during the heat of the summer the place stayed cool if you kept certain blinds shut. The hosts were very communicative and they have a local helper who checked us in and who was there in case anything went wrong. All we interacted with associated with the property spoke fluent English (and were native speakers from the US).
The Bad:
There were some initial inconveniences. The shower was clogged by previous guests and had to be snaked early into our stay (it would overflow after 90 seconds of use). The flush on the toilet broke, the hood over the stove was bent out of shape, the pilot light (and thus hot water) went out, and the sink lost much of its water pressure. The seat of an antique looking chair also tore during the stay after using it for a few days as a desk chair. Small inconveniences, but still inconveniences.
The Ugly:
On two occasions, people let themselves into the AirBnB without informing us first. The first was the local helper and the second was the housekeeper. Both situations wound up fine, but a little unsettling, especially when in a foreign country. There was no bolt on the door so anyone with a key, like the aforementioned people, had free access to the place whether we liked it or not. The hosts were very apologetic about these occurrences to their credit.
Overall:
This is a very good AirBnB and I would recommend it to anyone looking for a long-term place to stay in Paris. While we did have a few hiccups along the way, overall it was a great experience.