Garmin 301 Forerunner?

Does any one have the Garmin 301 Forerunner and what issues problems have you had specifically with the Heart Rate Monitor HRM, the strap, and the unit in monitoring heart Rate? In reading reviews of this item, the most often mentioned issue with the unit is the HRM function. It's not reliable and gives all sorts of reading that are off base. Some people seem to report lots of issues, others very few. Does any one have one, and what issues have you had with the HRM. I am considering buying one in the near future.