Halo LegendsI liked it for the most part.
Origins I & II - were basically digital comics of the history of the Halo universe. Some good art, but nothing special. Decent as an intro
The Duel - Kinda neat. It's super cheap but the watercolor filter they use makes it look cool at parts. Has some nice bits.
Homecoming - lololol, Beetrain. Holy crap this was bad.
One Man Out - wtf, I did not expect TOEI of all studios to make a super awesome short. Great animation, freaking hilarious. Slapstick Halo is where it's at. It's worth watching the compilation just for this short.
Prototype - Bones turns Halo into Gasaraki mecha porn. Great art and some good animation, but the story execution is weak.
The Babysitter - Some bad art and by the books plot aside, it's alright. Has some style and solid execution.
The Package - ^^; STAR WARS x MACROSS mecha plane action. This is what Halo would be if it was a saturday morning CG cartoon. Pretty bad but entertaining.
Overall I thought it was a much stronger comp than the Batmanime or the terrible Dante's Inferno anime. Not quite as good as the Animatrix, but worth watching. I watched it in

language because the dub got on my nerves in Homecoming. Worth noting the subs are just closed captions to the dub and not actually subs that match/translate the Japanese track.