Starting tomorrow Ouigo tickets go on sale.

The only plus:
cheap tickets

The minuses:
You're only allowed 1+1 piece of luggage free, the rest are 5€ per bag if purchased at the time of ticket purchase, 10€ if bought online after ticket purchase or 40€ at the station.
~630 seats instead of ~500 seats in a TGV duplex, and TER-like seats too. If they do 2xDuplex (likely), it'll be >1200 pax/train
Requirement to present oneself 30 mins before departure at the station.
2+2 and 1+3 seating
All tickets non-refundable (and sold online only)

In Paris, Marne-la-Vallée will be served instead of Paris-Lyon
In Lyon, the train will stop at Lyon Saint-Exupéry and lyon Part Dieu for some southbound services only.


A few links (in French):
http://www.la-croix.com/Actualite/Fr...2-12-26-892285
http://obsession.nouvelobs.com/voyag...les-moins.html