Well, there is some evidence to show multi ground strap plugs do last a little longer as a result of sharing the spark with multiple straps instead of one. The trade off, however, is this comes with a lack of combustion. Even the one ground strap of a typical J plug reduces the amount flame...
We just started carrying it at O'Reillys. It advertises that its "super refined molecules stick to the engine."
I plan to shoot my local rep a call and ask him a few questions as to pros and cons of this vs. the Edge.