This PS2 port is pretty spot on. All the levels and songs feel right, and the control setup is identical, right down to the slight auto-aiming of the analog aiming system. Basically, you alternate between guiding your cursor along a snaky, winding trail and tapping the buttons as they zoom into the center of the screen. The auto-aim is especially nice to have now that we're trying to rock using the PSP's awful analog nub rather than a DualShock 2 controller.
One complaint, though, is the issue created with the PSP's widescreen format. The buttons you need to press while dodging come from all four sides of the screen, but because the screen is so squat, it's hard to prepare for the icons floating from the top and bottom of the playing field. Considering how fast Gitaroo-Man's songs get near the end of the game, this can be downright frustrating. You'll find yourself just mashing the buttons during the final few levels; hoping for the best.