I've been looking at picking up the Polar S610i and getting the USB/InfraRed connector so that you can download your information to your PC. However, it is a bit pricey. I have never used one of these before. I am not a cyclist, and until I can undergo arthroscopic knee surgery I wont be running any time soon. I can see how they can be a motivational tool. My worry is that I will be wasting my money on something whose value is questionable. My quesitons are, how valuable are these in meeting your exercise goals? Is it necessary to try and be in your target heart rate whenever you work out? Are they annoying to wear? Do they break easily? Do the batteries run out often? Thanks in advance.