I stayed here for a month, and overall had a great experience! The view was spectacular and was definitely the highlight of the studio. It also had great natural light and an awesome shower. There's not a ton of cookware in the kitchen, but certainly enough to make basic meals. The location was ideal: there is a grocery store just on the other side of the street, the nearest metro station is a 5 minute walk away, and it feels removed from the touristy parts of the city. Also, I love how secure the building is--there are two security codes you need to even enter the building, and then you need a key to enter the lobby.
The main issue I had with my stay was the check-in process. The instructions listed on Airbnb said I needed to retrieve the keys from a public lockbox at a laundromat. However, the code for the lockbox didn't work. I called the host and he answered right way, and told me I actually needed to come directly to the apartment building for the keys. I imagine the instructions have been since updated for future guests, but I did want to mention my experience.
That being said, I would be more than happy to stay here again the next time I am in Paris! It's definitely a splurge, but if you are able to afford it, I do not think you'll regret it.