Just watched it (all 5 episodes) right now... not a huge Halo fan, to be honest. Loved Halo 2, thought Halo 3 wasn't all that great, Halo Reach was awesome, but thought Halo 4 may be pushing it.
This exceeded my expectations exponentially. I'm a friend of one of the main actors in this show and he said it was awesome getting to work on it. 117... holy crap. What a bad ass.