I bought one of these, and one perfect shot, at Sears when they were being clearanced for the same price. I haven't used them yet, since I haven't used the Wii in at least 5 months, so I can't tell you how they work.
But what I do know is that the wand that it comes with is pretty much the same shape as the Wii remote. The remote fits in the perfect shot just fine, and the official Wiimotes fit this gun fine.