This was a great little apartment for my friends and I when we visited Paris. The value for accommodating so many was excellent. It is a small apartment, so prepare to get comfortable with each-other.
The location (1.5 blocks from the nearest main metro station) is great, still inside the city, but not in the dense center. The neighborhood was fairly quite and nice. Andiana provided excellent directions from the metro station, and was very flexible with check in and making sure we had enough beds to accommodate every one. The front door has a combination lock which was a huge plus with a group this size!
The only minor complaints we had were that there is only one shower (with a group of nine that was an issue) and there are no windows to allow natural light into the living spaces or bedrooms. This made it super difficult to get up in the morning and start our day.
A few last things: the interior is decorated like a Piet Mondrian painting. There are mirrors everywhere.
The pictures on the listing (and mirrors) make the apartment look way bigger than it is.