First off, my son and I loved staying here, the view was even better than the photos, and it's a perfect location just a few blocks from the Eiffel Tower, the Seine, the Metro, etc. if you're there to do all the touristy things. And Hadrien was an incredibly friendly and responsive host.
As a host myself, I do think the listing should disclose that it's an inhabited apartment full of the owners' things. Wouldn't have kept me from booking since we were only there a few days, but would've been nice to know if we'd planned something longer. There's really nowhere but the floor to set your luggage but a small chair, and every closet is full of the owner's belongings. The shower and shelves are also full of their toiletries, etc. It'd be nice to feel like they'd left even a small space clear for guests.
Also, the place was not particularly clean by my standards as a host. The floors and kitchen drawers had tons of crumbs and leftover bits, and the fridge was clean-ish. But the stray hairs in the shower was pushing it.
Again, none of this in any way spoiled our stay. It's a lovely apartment with an unbeatable balcony. A deep clean, a more fastidious cleaner, and a luggage rack, perhaps, would make it exceptional.