I haven't beat it on hard at all, but that's because I'm waiting for a good team to go in with. I'd gladly use Atheons checkpoint, but as I've not beat it all the way through yet, the thought of increased loot is... well, you tell me. Speaking of which, anyone on 360 looking for an extra gun to go in with? I'm free alllllllll night long(unless someone in your fireteam decides to leave before we finish, then I'll just start over with another team).