Yes, that is a concern. There seemed to be a range of reports on the accuracy of this product which may well be related to the firmware version. I continue to take the watch and see attitude on it. The big advantage of course is its price and portability, which may also relate to its inaccuracy.
What bothered me most were the conditions. I've heard about the problems with rough roads and buffeting winds (e.g., while drafting) and position changes. But, I would have thought these conditions were perfect for the iBike -- smooth road surface, light winds, relatively consistent grade. IMO, one couldn't ask for more perfect conditions on the road.
