First of all The location is good. The price is overvalued for what it is. It did feel like a prison. There are no windows so I was suffocated. There is one skylight but if you open it there is chance of rain in winter. There is some external noise that is faint but disturbing to me.
The stairways are complete dark so you need to carry a flashlight or from the phone always.
The floors are damaged from water it seems. They are raised in certain areas so you need to watch your step.
The tub has no curtain so you have to very careful if taking shower. Don’t stand up in the tub, you will hit your head if you are a tall person.
There is no cooking whatsoever. There is a shared microwave if you want to use it.
The ceiling is slanting so if you are 6 feet and above watch your head. The door is small so you need to watch it too.
I had some issues with the mattress. My back was hurting the next day. The pillows are super thin so you want to bring your own.
Overall not something I would like to experience in Paris the first time.