Originally posted by captsven
I know the HRM has made me a better rider though. I could live without the flight deck, but the HRM I would miss.
I attribute all my improvements in speed and endurance to the HRM. It is the single, most important purchase I have made to improve my riding. I don't yet own a cyclo; I just have a stopwatch and HRM. I'll purchase one soon, though, for the convenience.