As described, location is central, metro line 7 is 2 minutes walk and RER B is 15 minutes walk.
There is a Macdonald's and a supermarket Infront of the property that's open till late at night.
It's a hotel room with shared bathroom and shower. shower is with a coin for 2.5 euro.
I didn't have troubles using the bathroom nor the shower, both were very clean and always available.
I would stay there again.