MSD, can you tell the difference?

I ran an MSD on my /6 bracket car years ago and really wasn't that happy with it's reliability. It made me coin the phrase "might suddenly die"...

My '71 Twister has had a Mallory electronic conversion on it for a long time. It works just as good as any box ignition that I have tried.

I may try another MSD later in the future but I am still not sure. I like for my daily driver's to start up when needed!