[Superman]

They're worth a try. There is no plug that lasts forever. I personally do not believe in exotic spark plugs. They don't out-perform plain old copper-core single-electrode units. I like NGK and Bosch. I don't think all those electrodes hurt anything, but they're certainly not going to last forever. Testing or replacing your cap and rotor are just as important.

It so happens I also believe one spark does the trick. Ignition happens or it doesn't. Not sure why multiple sparks (MSD) are needed. Single-spark systems that are running properly do not misfire.