Summary: Not too sure about the previous reviewers issues, I'm not sure why you'd buy a HRM with an external GPS and then criticize it for having an external GPS?! I've had one of these for a year and found it to be a very useful piece of kit. The HRM has quite a few features.
Summary: This is my second Polar product and like many people I stuck with Polar because I have all my training history held in their Polar software. However, next time I will 'bite the bullet' and change to Garmin.