I've got the Sigma on one bike and Flight Deck on the other. I prefer actual cadence to estimated cadence. Half the time I don't trust what Flight Deck is telling my anyway, it's a clunky computer and not intuative at all. Every battery replacement is a serious pain, having to reprogram all of the gears...maybe they fixed the friendliness in the latest versions...I dunno. Only criticism with the Sigma is it chews batteries.
