Just came back from CDG-EZE on a 777 in PV, and it's much better than regular Y. I would recommend to anyone taking a long trip. The cabin is really quiet, and you have much more space.
You arrive much more rested than flying in Y, I think is totally worth it when the price is not too much. Seats have more room to stretch, although they won't recline so much.
Service was good as always, and you get served before Y so all the options are available.