Our ugly yet do-able distant relations over at Kotaku have a hands-on with the Shredder, a third-party Guitar Hero controller. While they originally championed the device, a disheartened reader told them that it was actually a hunk of garbage.
They do not need to be pushed down as hard as the original, making hammer-ons and pull offs feel more natural. My biggest gripes about this controller are the tilt sensor and the select button. The tilt sensor is now a shake sensor. You have the shake the controller to enable star power.
Big deal? Probably not, but maybe you could just get the real controller and save yourself a shaking bad time.
Third Party Guitar Hero Controller Does NOT Shred [Kotaku]
http://www.kotaku.com/gaming/shredder/third-party-guitar-hero-controller-does-not-shred-181693.php