The A5 fitness tool combines exercise guidance with valuable feedback about your workout. A built-in walking test (Self Walk Test™) will tell you how fit you are and help you set up your exercise program. The ZonePointer™ will keep you in your Target Zone, and the OwnCal™ calorie counter will help you manage your weight loss program. It also tells you how efficient your workout was by tracking the time you spent in your target zone and total calories. The A5 is your personal fitness manager.
Weaknesses: Polar crap. No replacement battery for heartstrap. Shows you wrong average heartbeats sometimes (even if it showed 150-170 under training, it will show something like 38 average)
bought it for running. Later i started cycling instead, and it did its job. Still it only shows average hr, and hr under training, but no max hr? . Why?
Its not like its any difference to show average hr.
Polar to me is just selling stuff on reputation, but the stuff is crap. I bought a garmin instead and it works great. even wireless transfer to the pc.