I've seen the first two episodes. I was at Anime Expo and I mis-read my watch, and wound up at a screening room early. I decided just to wait for the scheduled screening of Haibane Renmei, so I sat down and watched... they were showing the dub of the first two episodes of Infinite Ryvius.
I got interested in it. It wasn't something I was planning on or interested in seeing, but I got rather interested in it watching the screening... I only saw about half of the first episode, though. A bunch of teenagers and some children on a spaceship... I think some kind of schooling craft, and all the adult crew got killed saving them from crashing or something... saved the lives of the kids on board, but lost their own lives, leaving the kids... And they wound up on a mysterious craft that was just out there called the Ryvius.
I remember a group of some of the teenagers taking charge as the leaders, claiming places as crew... I think they had the highest rankings among the students or something... And there was this weird "space - girl" if I remember... some being connected to the Ryvius.
I'm thinking of eventually seeing the series. It started out pretty interesting, and it seemed like a pretty good sci fi... Good sci fi makes Shadsie happy.