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From Fellrnr.com, Running tips
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* The SF-510 can upload your workouts via a Bluetooth link to your smart phone, but yet again this proves rather impractical. The Bluetooth link takes so long to upload your workouts that this is unworkable for regular use. The upload via a PC is less painful, but still feels rather crude and unfinished.
* Epson will upload your workouts to their website, which is rather rudimentary. There are various options for syncing your data with other sites, but if you want to have your lap splits included then things get tricky. I had to sync my Epson data with Strava, download CSV data from Epson, download TCX data from a Strava, and then write code to combine the two. You can consider me thoroughly unimpressed.
=GPS Accuracy =My previous test of the SF-810 was rather grim, so I didn't expect much from the SF-510. Imagine my surprise when the SF-510 managed to disappoint me in spite of rock bottom expectations! I would have thought that the SF-810 and SF-510 would have the same GPS system, but maybe it's tweaked in the SF-510 for greater battery life. The image below is from a small section of the trail I use for testing as I've found it highlights the strengths and weakness of the different devices nicely. In this case, it's just highlighting weaknesses:* The blue lap markers are widely scattered, and are so bad it's not obvious where they are supposed to be. If you compare with the [[Suunto Ambit2]] image below you can see that the markers are vaguely clustered either side of the true lap, almost like they're avoiding the correct spot. * The section under the bridge shows some issues with occasional trouble re-acquiring the satellite lock, but like most devices, the SF-510 does better here than in other sections. This is most likely because this is a fairly straight section of trail so even if the satellite signal is lost there's not much overall error introduced. Even here the SF-510 does worse than most devices. * In the twisty section in the middle the SF-510 does really badly, rarely recording a track that's close to the true distance, and often wandering off aimlessly. * The sharp corner at the right side is a little better, and this also is common. Most watches nail this surprisingly well, but not the SF-510. {| class="wikitable" |- valign="top"[[File:BridgeEpson SF-510.jpg|none|thumb|x300px| A diagram of the Epson SF-510's tracks, color coded with green indicating good accuracy through to red indicating poor accuracy, and the lap markers as blue dots.]]|- valign="top"|[[File:BridgeSuunto Ambit2 R 2.0.11.jpg|none|thumb|x300px|For comparison, here's the tracks from the [[Suunto Ambit2]], which does remarkably well. This is how the data should look. ]]|}(I've contacted Epson support and they are aware of the problem.)
=What's Missing=
While I don't consider these missing features as 'cons', it's worth understanding the features that are missing compared with other watches. You'll notice that the SF-510 has a rather long list of missing features.
