First, let me say that the host was really nice and easy to reach out to, and that the place was really well located right in the center of the latin district, and within a private court so it was really quiet at night. Also, there was a portable AC, not great but probably better than most apartments/airbnbs in Paris that usually don't have an AC. Check-in and check out was in person, which is unusual on Airbnb but didn't bother me (some people might care more). The place is also quite modernized.
On the other side, for the very high price (300$ a night) I would have expected a much bigger place. I think the pictures might be a bit misleading (it felt really really cramped tbh). I travel with Airbnb all over the world and this was probably the smallest place I've stayed at. It was fine for the duration of the stay but I wouldn't stay there if I was more than 1 person.