We have stayed in many hotels, including in Paris, but this was pretty upsetting for a so-called 4 star hotel.
In particular the bathroom was truly terrible: it was small even for Paris but what made it even more of a miserable experience was the shower valve that protruded directly into the middle of the shower, and an awful shower curtain that was also set too close to the shower and left no space in which to stand. The toilet seat was also a mismatched size with the toilet bowl.
The lift smelt of sewage.
Location was okay, it's not a glamorous area but seemed quite vibrant at night (we didn't have any noise issues).
On the plus side, the staff were really very nice but not enough to tempt us back.