FCP 6 always felt solid and stable: in several days of testing on five machines, I never experienced a crash or lockup. Performance was consistently zippy on dual-G5 and faster Macs, and installation went smoothly. My biggest issue was the time it took to install the full nine-DVD, 55GB suite, and making room on a boot drive on my older G5s in order to do so. The system requirements are moderately steepyoull need a somewhat recent machine to run it: at least a 1.25GHz Power Mac G4 with AGP or PCIe graphics for standard-definition video. HD video requires even more CPU, GPU, and RAM.