HEI mod, comments?

Anyone have any comments concerning the HEI mod? There seems to be a lot of concern about its poor performance above 3k rpm, although I have read one or two articles stating this problem is due to over-heating when the module is mounted in a distributor/coil/module integrated application- not a concern in this mod. I've also heard that the higher quality Accel doesn't have this problem.

I know one answer is why bother, just use the e12-80, but they’re becoming harder to find and it would be nice to have another option.

Thanks