I use a Polar - can't remember the model. It does the usual bit. The only issue I have with it is it has an "auto on" feature, i.e. if the chest band and watch get very close together, the watch starts going in the stopwatch mode.

Very irritating, especially when one doesn't unpack ones suitcase for a month and finds her trusty heart monitor has been timing her domestic shortcomings.

spazz