Ignition boxes - worth it for the effieciencies

The MSD advertises that it will do a few things. Better mileage & power from more sparks, more intense sparks, quicker start ups, & even lower emissions since all (or close) the fuel is being burnt.

I have found this to be true. Also use there coil mounted upright and up grade your wires and new plugs for the full package and best results.

Gotcha's?

Readjust the timing and fuel mix to get the best results. Start at a gap on the plug @ .050.
Problems in placing the box. That took longer than the instal.

My luck with MSD however has been less than stella. I have swap in and out approx. a dozen boxes. Returned them for repair under there warranty only to have them fail several times over and over. I will not personally ever purchase a MSD ignition box ever again.

I have 1 working unit from them that has lasted about 10-12 years now. If and when, actually, I'm sure it's when and not if, it goes, I'll look elsewhere for an ignition system.
Other people I know have had there box 15 plus years, no issues.

Personally, I don't know how they stay in biz with my track record with them.