Yeah, some of my buddies have run the 35. I have abstained, though for exactly that reason. No checkpoints=GARBAGE. I rarely have the 3 to 4 hours it could take to complete it and even when I do, it doesn't necessarily line up with my buddies. Sad. Really sad. It was so awesome there for a while. I sign in and nearly everybody on my friends list is playing the same game. Oh well. 'Maybe Halo 5 will be good.' :-)