I've been looking for alternatives to the Polar for the very same reason - it fits better around my ankle than around my wrist... I've tried a few other HRMs though, a Sigma and a Oregon, and they both seem to behave strangely somehow. The first one simply died on me, I kept having no pulse (!), and yes I did change the batteries, the other one has the least usefriendly interface one can imagine, and regularly a) refuses to provide HR monitoring at all, b) refuses to start the timer (!) and c) dreams up its own pulse values ( I don't think 264 BPM is realistic, especially not when I'm not even breathing heavily). So I've resigned, and am currently saving enough money to buy a Polar. They cost a fortune though, and as I say, they fit my ankle far better than my wrist, but at least it can be mounted on the handlebar. Let's hope it won't make the bike lop-sided...