never got on with mine and sold it. I found that if i geared it up around 70 GI i had a good flat/rolling gear and could climb anything i could with the 2 spd hub just at a slower cadence..
Yeah was thinking it's a bit of a wimp out but also has the potential to make the difference between arriving at work a sweaty mess or relatively composed which is my main concern as there's no shower facilities.
Are the SA 2 speed hubs any good now? Seem to remember them getting panned when they were released because of mechanical failures.