Ok people here it is.
I have a Kama (the nice looking old one) and it works great. I bought about a month ago id think, and ive probably played a good 20+ hours with the included batteries. As for responce, well it works just like a regualr nunchuk...about a good 95% of the time. THere are time when it will disconect, and youll be unable to do much for a sec or two, but thats very rare. A bigger problem i faced was its range or strength of it. IF i had somthing in between the Wiimote (and dongle) and Kama, its effectivness would drop a good 40%. Example, i would play on the floor with my knee up, my right arm on one side and my left on the other. After a while i learned that the Kama didnt work well in that possition, i switched to a couch and ive been playing at a good 95% or so effecency.
At $15 i think its a steal. Ive played the Kama with games like Re4, MP3, and CODWAW, among others. So i think its a great product.