Another factor: acceleration-based cadence is challenging if you don't have a way to separate centrifugal acceleration from the bike bouncing up and down. I wonder how they make that work and how well it works, especially at lower cadences (for example, 40 rpm) on rough roads, especially since their accelerometers appear to be on an intermediate radius of the crank arm (where centrifugal acceleration is less than on the outer radius, for example at the pedal).

Put out a reliable power meter that measures power independently for each leg at a reasonable price point and it will be a niche product no longer.

Everyone who rides will get one. It's a disgrace that after 20 or so years we only have SRM and Powertap in an industry where change to whole bike lines occur every year.

Changing the topic slightly: Has anyone spoken with the reps at the Garmin booth regarding updates on the Vector release date? Are they even displaying them? I know this is wishful thinking but the Vectors, as advertised, are ideally suited to my needs.

Garmin’s stance is that they won’t go into production until they can press and ship thousands of units at once. And it was noted that they won’t do that until the quality bar is there. It’s been clear talking to numerous Garmin folks at both Eurobike and Interbike that the technical and timeline stumbles with the FR910XT are still painfully fresh in everyone’s mind. There’s no desire to reenact that again.

That all said, timeline wise the public stance is Q4 CY2012 (end of year). I think we might see some more concrete info and display at CES (first week of January) around their distribution and release plans. But I wouldn’t expect to see a Vector under a Christmas tree this calendar year.

On the Vector, I was told "a few months into 2013."

Also, "it's a $1500 unit. That means we don't want a single return."

It's a disgrace that after 20 or so years we only have SRM and Powertap in an industry where change to whole bike lines occur every year.