Oh hey look embargo's up. Fuck those marshmellows. Here's what I think.
That clip is from one of the few interesting levels. Each level is a flashback and each is centered around a certain theme, basically. There's a warthog level, a tank level, a sniper level, etc.. This wouldn't be so bad if the main storyline that links them all together (that you have to play through) was solid, but it has you walking around a barren city looking for clues. It's mind-numbingly boring. The storyline is shitty and not even Fillion can save it. The dialogue is fucking atrocious. At one time after killing an alien your guy yelled "You ever see Full Metal Jacket?!?" as a taunt, and I'm still scratching my head over that one.
The storyline takes around 8 hours and is so bad you won't want to play through it again, and I was taking breaks pretty damn frequently. Not even as good as Halo 3. This is DLC stretched to its breaking point, nothing more. Firefight's a good mode but is friends-only (4 people online, 2-player co-op only on one console) and it gets really old after a few rounds, because it takes a helluva long time (least a couple of hours if you're good) and they just keep throwing the same enemies at you, wave after wave.
Full review coming Monday after I get some more Firefight in, but I can smell the hate mail already.