MSD streetfire problems!

I just thought I'd update my with my own ignition issue. I tried that pertronix limiter and I never got it to work. I just said the hell with it and returned it. I think I'm going to go with the Mallory Hifire VI (model 685). It has a built in rev limiter, start retard and rpm window switch with spark retard if you're thinking about running nitrous. Anybody have any feedback on it?