Check out Gameplanet's review of Halo 3: ODST here:
360 REVIEW by Joel Lauterbach
There's something I need to get off my chest, simply because I am so thoroughly overjoyed words can hardly describe: the pistol zoom is back in Halo, baby!
For those of you who have been following the epic Halo franchise since the early days in 2001, you probably remember a pretty awesome pistol zoom that allowed for some mighty accurate and powerful head-shots. Most fans will rejoice at this news I would imagine, and run out and pick up Halo 3: ODST. But if you just hang on a minute I'll put it in a context. Halo 3, although being a pretty great game, certainly had its flaws. While being nice and polished enough, it took away from the fun in some pretty distinct areas and stepped on some fans' toes in the process. In true Bungie style however, Halo 3: ODST feels like they’re trying to make up for something, and maybe, just maybe, they have spent a few years listening to feedback and refining their development.