It's now really really cool with the new MediaVPs. Besides the OpenGL SL bug.
The OpenGL Shader bug is a pain, just tried the OSX version out today (started playing in Bootcamp XP and remember it ran on OSX) and with the suggested 3.6.10 MediaVP settings missing starts at 4-6FPS and after a period of 30 - 60 seconds the FPS jumps up towards 60FPS, where with -no_glsl on the mission starts at 60FPS.
This is on a Early 2009 Mac Mini with 10.5.6, though I did find a thread where apparently running a MB on 10.4.11 didn't exhibit the problem.