Calling it a treat from end to end, TeamXbox also quite liked Halo 3:

Perhaps more than anything, we were particularly blown away by the scope and scale of the environments. The Halo series has always been known for its grand scale, and Halo 3 only makes things that much bigger and better. You won’t be spending hours exploring underground complexes or anything here, as the development team decided to focus their attention on creating rich, immersive worlds. The level of detail is truly amazing, as you’ll be able to notice individual blades of grass in fields, broken twigs on the floor of a forest, and tiny pebbles on beaches. It’s truly a sight to behold.

Although they graded the music higher than the graphics (and who can blame them, giving what Marty puts out?) the game overrall nabbed a 9.7 out of 10 score.