Got this as a Christmas present (2014) for my girlfriend to replace her 'tired' Forerunner 305 due to battery issues , to be charged further about an hour. Either send it in for repair/replacement for $75 (or more) or just buy her a new one. These new Garmin watches have much more advanced built-in GPS antennas and this watch is proof of that. Acquires a satellite very quickly, typically within 10-15 seconds. Even faster when enabled from the repeat start point. Battery life is excellent as it can now run a 4 hour marathon with around 65% battery left. She loves it. If you're a runner, you know how stressful your run can be when you're constantly worrying about your old GPS watch turning off or giving an error while you're running. She doesn't use a heart rate monitor, so I can't comment on that. I've seen a newer model have an optical heart rate monitor; I wish this would have been available last fall. Check out "dcrainmaker" technical reviews. A good site to learn about all the major GPS watches and brands.
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