REV-N-NATOR vs MSD Street Fire CDI

I run a rev-n-nator and its fantastic. No mucking about to install it. Bolt it in where the old one was and go. As for their advertised horsepower claims? I can't guarantee that. I haven't run it on a dyno vs any other system. One thing I will suggest with the rev-n-nator is to get the distributor they recommend. I'm running mine with an old reman and I know I have some spark problems (a very rare miss which was worse before I got the rev-n-nator). I'm pretty confident switching to their recommend distributor will really clear things up and make the thing pull hard.