Chrome ignition module vs rev-n-nator

I went with a FBO unit from 4 seconds flat. Has a built in rev limiter. Car starts much easier and idles better. You bypass the ballast resister . They do take a certain coil they sell . Got mine in a package deal . Coil,box and connectors for 169.95. I was going to go rev-a-nator but heard about problems with them.