I had an older bike that had a rear derailleur, plus an automatically shifted two-speed internal hub. I no longer have the bike, but I have to say that I really, really liked the automatic shifting. That hub had an adjuster that let you change the RPMs of the shift over a range (could only be set when the bike wasn't moving). It was clean and crisp shifting, and I really liked that it downshifted to Low when the wheel stopped spinning. THAT is what I would like... it sounds like that's what the Automatix is.