Wired's Chris Kohler reviews the Wii Zapper and writes that "the Zapper actually makes Wii's shooting games less fun." Here's the conclusion in his review:
"The problem is that while Nintendo promises the Zapper will 'steady your hand and improve your aim,' it actually has the opposite effect. The Wiimote's basic pointer technology lends itself especially well to shooting games, and the Wii Zapper improves nothing. In fact, hauling a heavier, gun-shaped plastic contraption around with both hands only weighs you down and makes it harder to hold your aim steady.
There's really no compelling reason to turn the Wiimote into a light gun -- the standard remote works better without the accessory. Held in one hand, the Wiimote lets you blow away targets with pinpoint accuracy using very subtle, small wrist movements."
[ This review does not assign a rating or score. ]