The space is very small, but if you plan on traveling alone, it is okay for the price. It is a convenient walk to the Eiffel Tower and near public transit. The space is as described- very small. It wasn't ideal to have to go outside and use a toilet that wasn't in a heated room in the middle of the night, and the water doesn't stay hot for very long in the shower.
Overall, the space is to be used like a locker anyways, as there is so much to explore in Paris. If traveling on a budget, it is an acceptable place to stay for sure.