First the good. Check-in and check-out was easy. The location is great. It's very close to a Metro station. And there are plenty of nice restaurants, bakeries, and cafes within immediate walking distance. The area felt very safe. We didn't visit Paris to spend a great deal of time in the room anyway. So the room was good enough for us. It was clean, and I think a good value for the money.
The rest is to be informative, not to complain.
The place is quite small. Whatever your expectations, think smaller. You will have to watch your head in about half the unit if you are an adult male of average height. That being said, the shower is surprisingly spacious.
I got a little claustrophobic. The room sits atop a 4-story "tower" winding staircase. There's really no windows in the place, just a couple of low skylights. So forget about a view. If you are tall enough, you can see a few neighboring balconies. I started running scenarios on what to do if there was a fire in the building.