I've always wondered why the cadence sensor also does speed, when it only works with a GPS which is measuring your speed anyway. On the other hand, it has the speed written into your GPX file, so if you wanted to do anything in software that wasn't able to recalculate it, that could be a bonus. But how many people actually need to do that...?

Anyway, apart from your trouble getting it set up with your bike frame, how do you like the Garmin cadence sensor? I was thinking about picking one up myself. I've got an Oregon, and a mount to get it on my handle bars, so I've been appreciating it as a heart rate monitor and bike computer. Seems like cadence is the next thing I should be aware of...