Shortly after L'Avion announced their all-business class service between Newark and Orly a couple of years back, we gave them a try. The waiting room at Newark was grim grim grim, but surely that's been fixed now, as it was then just a temporary space.
L'Avion works if you're actually bound for Paris, or connecting to the fairly motley group of destinations served from Orly (primarily former French colonies and destinations across the Mediterranean), but if you're connecting to CDG, grappling with the drive across Paris pretty much unravels the benefits of traveling business class.
Online Travel Review links to what it says is an internal memo that doesn't sound good, in a story titled OpenSkies and L'Avion: Beginning of the End?