I'm not personally familiar with it, but after reading the points made
here I'm skeptical too. To boot, 99% of
links I found regarding this type of system were "pitches" for it...not unbiased 3rd party reviews or opinions of it.
Now, if and when a reputable source like Popular Science, Popular Mechanics, Consumer Reports, etc. says something good about it, then my ears would perk up a bit.