msd enhancer are they worth it

I've sort of gained the impression that the MSD Enhancers should be considered a 'consumable', in that they don't last forever (maybe a few seasons running).

Opinions, please!

I've heard of some dying after a couple of years, and others that have lasted a long time... I guess its like all electronics, its usually a $0.03 capacitor that blows - its just a matter of time...

Anyone (apart from Waxhead) tried the WaxRacing ones?

X2, if yours keeps failing just remove the stock limiter!