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* The biggest advantage of the SF-810 is its long battery life with the [[Optical Heart Rate Monitoring]] turned off. However, the SF-510 is a lot cheaper, and lasts for 30 hours.
* The SF-810 is fairly small and looks like a normal watch. Admittedly, that's a normal watch from the 1980s, but that's better than looking like a wrist mounted dive computer. I found the strap to be comfortable and easy to use, something I wish was true for more running watches.
* The SF-810 has [[Optical Heart Rate Monitoring]] is perhaps a slightly less grim than the competition, but it's still relatively uselesswhich may be useful in some situations. Even in warmer temperaturesUnfortunately, it accuracy is not good enough for real world usage. To compound matters the SF-810 does not support a chest strap based heart rate monitorfor times when you want more accurate heart rate data.
=Epson SF-810 Cons=
* The [[GPS Accuracy]] is terrible; I'll add more details soon, but for now I'll just say that it's at the bottom of my GPS accuracy table.