Suggestions for HRM

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Good Morning,

There's so much information out there about heart rate monitors(HRM) and I wanted to get the forum's opinion on them. Specifically looking for information regarding your experience with the accuracy of the monitor, pros/cons of various devices and if you've noticed any difference in your performance by wearing a HRM. I'm looking forward to your responses and I think this should be great information for anyone considering such an investment.

Thanks in advance and Happy Thursday Everyone!!!!