GarminHRM 600

This is no doubt a pricey heart rate strap, but it's accuracy, stability and quality construction, could save your life! I have had Garmin heart rate straps over the years and have always had issues, over time, after changing the batteries a couple of times. This one, however is USB rechargeable and that also saves the landfill issue with battery disposal. It paired almost instantly with my new Forerunner watch and the Connect App, which now shows when this specific strap is detected,by the watch. No guessing which device the watch is linking to. The only criticism I have is that I would prefer waking it up by the button on front only, rather than auto detection. This way you could have the strap on before getting to a exercise location and manually activating it when you get there rather than having to take your shirt off to put it on when you arrive, to save battery life.

I got the HRM-600 because it seamlessly complements "both" my watch and the app, offering extra stats or acting as a backup when my watch battery is low. While I also own a Polar H10, it only connects to my watch, making the HRM-600 more versatile.Pros:- USB rechargeable,- Connects to both the Garmin app and watch, ease of use- Added functionality over previous models.Cons:- Average comfort and battery life;- Device-2-strap connection feels too tight raising concerns about its durability- Green light is visible through clothing.I don't have means to measure accuracy, but I have read great reviews about the Garmin sensors.I'm finding the Device-2-Strap connection uncomfortably tight, which is a major drawback and could ultimately lead to a return. I'll give it a few more days to see if the fit improves.