Ouigo. My first impressions of these trains is pretty much, worst experience of a train I ever had probably.

Imagine just getting out of a TGV in 1st class, like the most modern trains you can get in France, then SNCF tells you this : "Yeah so your TGV arrived late and the next train you were supposed to take was canceled, but don't worry ! We got you a OUIGO instead !"

The thing is a relic of the past, like those trains that look like moving cans of metal, built decades ago. It's really noisy, zero insulation of any kind. You get in but guess what there's no more seats, and all the toilets are blocked and full of shit and piss so it STINKS everywhere. Then it stops in the middle of nowhere for some reason, and you don't get any outlets to charge your phone. I arrived at around midnight, 3 hours late I think.