For me, Generator Paris was poorly managed, in need of repair, and overall not worth the stay. Farther options in Paris are much better since the metro is fast/reliable.
The room is about what you expect for a hostel, but with some extra issues — having 1 bathroom for 8 guests, putting a top bunk bed directly under the room’s very warm light, and a lack of privacy curtains in the beds themselves.
The bathrooms were much worse, many showers were filled with black mold, the water knobs and shower heads were often broken or non-functional, and water temperature would change up and down on it’s own.
The luggage locker room also charged me twice without providing me a locker — and when I asked the front desk about the €8 I lost twice, I was told nothing could be done.
However, I’ve had very positive experiences in other Generator hostels (the one in Amsterdam was great), so I don’t think it’s a company wide issue, but specifically the management of the Paris location needs some work.