Anyone that has problems with it running smooth don't know how to tweak their system to get maximum performance.
What the hell are you talking about? Yeah, Halo runs pretty smooth in 800x600 with FSAA on my AMD 1700+. I'm just saying that (a) for how it looks, it >should< run better, because other than a lot of fancy effects, the levels are sparse and unimagiative and (b) when it came out, it ran like absolute crap on nVidia fx cards. Hence the 25% + 25% + 25% performance increases.
As for it "rocking", that I guess is a matter of opinion. Personally, I couldn't get through it because after playing level after level that looked the same with the same 4 or 5 enemy types, it got old.
Anyway, the whole point I had was that Halo runs worse than games that look better. Case in point, I can run DX:IW (another horrible game) in 1024x768 w/FSAA and it performs better than halo and looks a lot better. It's a known fact that Halo has poor performance. Get over it.