As seen as there is a game with it i don't see how people think it's expensive as it would cost you around $55 - $60 for the wii controller with numchuk which the official ones only have a 30 day warranty with them.
Maybe it's the small TV that the kids use but the thing drives me crazy as the pointer jumps around a fair bit and is not all that fine tuned either.
To me it's dam cheap shame you have to have that game with it and other some what comparable PC tracking hardware it is cheap.
for example Trackir 4\5 or even, SmartNav and OptiTrack which are even more expensive. Although there support is way the best with there hardware and for sure much better than than Razer ever puts out.
How ever i would like to know why hasn't natural point put out such a device maybe it be the cost i don't know but you could count on them to do it right.
http://www.naturalpoint.com/