Could use documentation but not that difficult to get set up and going, and once it is running... wow! Set to the unlimited speed, it appears to run at about 500 times a stock GS. Really complex things work right off the bat: Softswitch, The Manager, UtilityWorks, Prosel16 (of course), and AppleWorks (classic) with complex macros. The only problem I experienced was having to frequently swap mouse settings because the mouse would work for a while and then suddenly be limited to just a part of a screen.