Vibrant neighborhood; many varied dining choices; convenient for public transportation; reasonable rate; beds comfortable and room, though tiny (as is perhaps to be expected in Paris), was warm and well-appointed.
Immediately outside the property it constantly smelled of urine and litter was often present - I imagine it's an endless battle being across from the train station, but no effort at all seemed to be made. Lobby and elevator often reeked, too.
Room was not ready for us when we arrived, despite being over an hour beyond check-in. Front desk was not aware of the situation till we mentioned it. ("My computer says it was cleaned", the guy at the desk said, clearly not about to take responsibility.) We had to leave and wander around for an hour after our ten hour overnight flight before we could unwind in our room.
The shower was door-less and the drain extremely slow, so we had to continually turn off the water and wait or the entire room flooded.
Twice when we returned the door was locked and we had to knock and wait before gaining entry, and room turn-around sometimes wasn't completed yet though we were returning to it late in the afternoon.
Bottom line is that they seem to be understaffed, but once you get into your clean room it's comfortable, and it's great to be right next to Gare du Nord metro station.