If you haven’t bought any of the multiplayer maps you get the most bang for your buck. I liked it, and the story mode was pretty decent. I love the new Magnum. Firefight is fun, and now I can actually enjoy it instead of fretting over my Vidmaster achievement. Oh, and having Recon armor is nice too ;). And I’m the friend that got @justn to buy it.
@Bugabear, I think the reason that only the mongoose was put into the Mombasa Street levels was because having a ‘hog would be pointless, there would be no one to be the gunner. A tank would have been too easy, same with a ghost. I think Bungie wanted you to either walk and be able to defend yourself, or travel fast and be vulnerable.
There is no matchmaking for Firefight, it’s just supposed to be for playing with your buddies (otherwise you get team killers, people who play obnoxious music, or they just suck. And you’re stuck with them for two hours, so better make it private parties only is what Bungie said, I’m guessing). The skulls are on so that each level is progressively harder than the last.
About the turrets- yeah I think you shouldn’t be able to rip them out either. But you are an ODST, the bamfs of the UNSC marines I guess ;).