I've used them, and now use the digital control box to drive my 10 box with all the same functions and on the same program.

They add a ton of tuning options, and for a nitrous guy, or forced you can't beat it. I'm N/A now so about the only thing I use anymore is the start retard, mag comp, and individual cylinder timing, and high gear retard. The runcurve is a good thing too and easy to use.