I just flew on Air France from CDG on 777-200 in PV class, and here are my thoughts (I share this information because I discovered a few things about that class that I saw mentioned nowhere, including Air France's site):
Good amount of personal space. I'm 6 feet tall, and I didn't feel cramped. Seats are wide enough, and I was able to stretch fully at about 30 degrees without touching seat in front of me. Part of the seat raises up to support knee area, and there's a foot stool.
Board with Elite class, before coach.
Deplane before coach.
You're in your own 'curtained' cabin between coach and business. More intimate than coach.
Cool looking seats. Unlike some so-called PE classes with some airlines (which only give you a bit more leg room), you actually feel like you got your money's worth.
Same size screen as in Business class (10")
Overhead space abundant since fewer seats in PV with same amount of bins.
Same travel kit, blanket and pillow as in Business class.
Can use lounge, for a fee (I paid 35 euros in Paris). Well worth it as the departure lounge there is awesome!!!!!!
Noise cancelling earphones. Actual earphones (use the protective covers located in your kit), and not those coach class plastic things you try and shove into your ear that won't hold.
Seats are extremely HARD!!! Harder than coach! Bring a pillow; I'm not kidding. After 90 minutes of flight you'll see/feel what I mean.
Coach food (although AF coach food is pretty good).
You have to use coach bathrooms in coach class.
If you're trying to climb over someone to get to the aisle, good luck!
Flimsy earphone cord. On both flights the sound would go from mono to stereo. Can't remember if business class has same issue.