Amazing location! Anthony is nice and responds quickly.
The apartment itself is quite small and crammed (expected for Paris). If you are planning to use the sofa bed, you won't have much of a living room left so this place would be best for 2 people.
My main issue was the shower drained so slowly that I was always standing in a pool of water 5 minutes in. Anthony was quick to reply and let me know this was being worked on though so that was appreciated. Also, the water tank is small and towards the end of my shower (10 mins), I was always running out of hot water. You cannot shower back to back with 2 people or the second person would get entirely cold water. I think this is more common in Europe but we found it to be a bit inconvenient.
We stayed in the crazy summer heat. There are two fans which help but if you're American and used to freezing cold AC, you may have some difficulty adjusting to the heat of Paris in summer. We opted to leave the windows open hoping for a breeze but there's a lot of noise coming from the restaurants downstairs and the cigarette smoke floats up into the room (obviously, this is completely out of anyone's control but I'm just mentioning as it was hard for me to sleep).
There is one bus station that is close but the metro is about a 6 minute walk which seems far when you're dripping in sweat. But I loved being able to walk to the Louvre from this apartment.
All in all, stay here for the great central location. The apartment is cute but tiny. It's priced reasonably.