For those of you who didn't like the first one, try watching the other 4. The series got good when Master Chief showed up. And from what I hear, the LE version of Halo 4 comes with a 90 minute extended version of the Forward Unto Dawn series.
I thought FUD (yea, I did that, wanna fight about it?) was pretty well done. It had a Bstar feel to it, and made me think a tv show set during the covenant war would be pretty sweet as long as Spartans weren't the main focus.