Polar RS100 Best Buy, Great Product.

Polar RS100 Best Buy, Great Product.
I really love this heart rate monitor! The only slightly negative thing I can say is that while it is unisex, it looks big on my wrist (I am a petite female). However, since female HRMs are smaller, it's hard (if not impossible) to find one that displays all the features that this HRM does. The fact that it is bigger makes it quite easy to read while running. And, you can toggle through the top line to display your lap time, time of day, or calories burned while you're using it. There's no way I could trade it for a female HRM.

If you are a female, then my advice is to first decide whether you're okay with the larger watch (if it's any help you get used to the larger size after awhile). If so, then I highly recommend this one.

Polar RS100 Best Buy, GREAT DEAL!
Got this as a gift for my wife. Fairly easy to set-up, and works great. The chest strap is comfortable, and it's even water resistant to use for swimming (although we haven't tried that yet). Added benefit is that it automatically syncs with exercise equipment that uses Polar as well. Like treadmils, orbital machines, etc... No grabbing the bars, it sends the hear rate right to the machine. Great!