I'm normally really cynical (as anyone who reads any of my posts would know) but I thought it was really good.
I even showed it to my dad and girlfriend, and they were impressed (even though neither of them had a halo background).
The one thing I noticed was while it's telling the human-side, I had to explain that it was set in the future. Apparently that's not readily evident from the cryo-training portion. Also a blurb about what the cortana-transmission was all about in the beginning was necessary for the girlfriend/fathers understanding.
But yea; I found it to be really, really good. Eagerly awaiting the next episode, and I'm starting to feel quite good about ordering the LE edition.