Well, I posted this in 'Training and Nutrition' with no response; so I'll try again here:

I was thinking about getting a Powertap - but had a couple of questions.

For reference, here's cycleops' comparison guide: http://www.cycleops.com/products/pow...comparison.htm

1. Cycleop's says that the base Powertap has 'Cadence Measured by Hub' capability, but not 'Cadence Measured by sensor' capability. Huh? Does the Powertap know what gear I'm in?

2. Can I use a general polar heart rate monitor chest strap, or do I have to use the cycleops strap? I ask because I was thinking about buying a used Powertap... and using a HRM with a couple thousand of hour's worth of someone else's sweat... well, doesn't sound appealing to me, even after being washed.

3. Anyone use the 'customizable' display on the Powertap Pro? Is the Pro worth the price difference?

Thanks!