Christmas is comming. I'm wondering what whistles and bells are really used on a HRM. I'm looking at Polar models. One of the M series keeps information for 2 people (that could benifit ME!) but the S series have cadence (he dosen't have that on his computer) computer downloading and much more.
He likes things pretty basic. (I just reset his bike computer after 3000mi. He never knew how far he rode, he just kept riding)
What HRM do you use...and how many of the functions do you use?