The D-pad tends to be a little slow and straight in responding and the joystick is a little too fast and wiggly. This can cause no end of trouble when you are trying to aim or if you or your targets are moving.
I really like SS and will pull it out of the shelf once every few moons, when I'm about three dozen other PS2 games shy of suggesting you spend $50 for it, when the same price tag can get you a discounted "House of the Dead 2" and third-party lightgun for your Dreamcast.
If sending a single bullet through someones head thousands of yards away sounds like a good Friday night to you, then Silent Scope is right up your alley (and therapy might not be a bad idea, either).
While the lack of a light gun will disappoint some, and gamers looking for depth are barking up the wrong tree, Silent Scope offers some of the most stupidly pleasurable shooting action to be found on PS2 (or anywhere).