Ciclosport HAC4 vs. Polar s720i
Heartratemonitor.co.uk Comparison. A good comparison of the two best cyclocomputers out there. The Polar, I have. It is twice as expensive because it measures power output more exactly, but the HAC4 has more features.
Plus, Lance uses the HAC4. Anyway, I ordered the power output kit for the Polar, so we’ll see. Beside the more accurate power output calculation, the HAC4 has more altimeter functions such as the gradient, rate of ascent and descent.
Summary is the HAC4 sounds like a better value, but the Polar is more accurate. Also see the “Cycling Forum”:http://www.cyclingforums.com/t25754.html thread that essentially says the HAC4 software isn’t that good and the Polar is unreliable in its readings.