TANSTAFL
$500 would buy you a bunch of private lessons with yours truely, and at least that many, if not more with your teacher. In my opinion a much better investment. And I Guarantee you will not look like a Black Belt with a few easy lessons on anything ... at least not a solid Kenpo Black Belt.
Once again, it may be a useful tool - but only that ... in my opinion. There is lots of equipment I could buy, seminars I could attend, or folks I could fly in for the same money. Not saying it is bad, but hell, who can argue with marketing like:
"Incredible Kenpo Machine"
"the greatest martial arts tool of the new Millennium, THE KENPOMAN!"
"most effective training tools to build speed, sequential flow, spontaneous improvisational action, alertness and realistic reaction to action"
Great Marketing, bet you could build one if you saw one, it just would not look as pretty. Obviously I am a proponent of live opponents, which you have no lack of, and live teachers, again, you have no lack. I do not mean to disparage Mr. German's training aide, it is just that I know budgeting can be tight for everyone, and I have harped before on cost effective purchases in terms of how they actually affect your performance as a Kenpoist. Guess I am back on the soapbox.
:soapbox:
At your level, the extra lessons, time, or practice with an opponent may get you to where you want to go faster. Then later in your training ... or when you have made that first million, buy every gadget, video, interactive DVD, (and by then maybe a neural implant that would forgo any training ... well OK, so I am talking about for me!)
See if you can get one with a 60 day "return if not satisfied" guarantee, then nab it. You will soon know whether it is worth it's salt. It well may be.
Oss,
-Michael