Game Informer liked almost, almost everything about Halo 3:

With a satisfying campaign closure to the series' epic story arc, unprecedented multiplayer options, an innovative video recording feature, and heretofore unseen console mod tools, Halo 3 lives up to every bit of its ever-expanding reputation. However, a few small disappointments chip away at the game's shot at perfection.

One might say it's a good thing Halo 3 has one strand askew; nothing in this life has any business being perfect.