I know Dyna had some QC issues about 10 years ago or so with pickups crapping out on people, as I was one of them. Despite my ignition being well out of warranty, they replaced it for half of what it would have cost for a new one. I have always been able to get detailed and concise information when I have called them.
Beyond that, there is probably no other aftermarket ignition with as many trouble-free miles on the market today.