I enjoyed my stay at this AirBnB! The view really is fantastic, and the metro is literally across the one lane street. The apartment is pretty sparsly furnished, but is comfortable enough - although I would have really liked more linens (perhaps a dishcloth to supplement the moldy smelling sponge, and a second dishtowel) and more than one wine glass. There was plenty of room for two people, but I'm not sure how four people could function in this small space.

When I first entered the building I was quite afraid. It is VERY dark inside and it took a while to find the lights - which automatically turn off every minute or so. The elevator wasn't big enough for me and my suitcase (it's the smallest elevator I've ever seen), so I had to lug it up 5 flights of a narrow, twisting staircase, and in the dark this was just terrifying. Once I found the lights, and met a few people (who were super kind) in the building, I was more relaxed.
The walls were thin and I could hear neighbor's conversations, but they all got quite very early and it wasn't an issue. The bed, in my opinion, was one of the most uncomfortable beds I've ever slept on - and at the end of the day, that is the only thing that would keep me from staying at this AirBnB in the future.
One warning - they asked for a 250 Euro deposit, which is significantly more than the $218 US dollars on the site. They also asked me to sign a contract, but it was in French - they suggested I use Google translate, but it was saved as a .pdf file so I couldn't cut and paste, my only option to translate would have been retyping the multi-page document. A French speaking friend helped me, but at the end of the day the hosts didn't use the contract.
If you are looking for luxury, this is not the place for you to stay - the uncomfortable bed and lack of linens made the stay harder than it needed to be. However, it is a good deal if you want a view of the tower and to be close to the metro.