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From Fellrnr.com, Running tips
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=Ambit3 Run Cons=
* The biggest downside to the Ambit3 compared to the 310XT/910XT/610 is that there is no way of displaying your current pace from the [[Footpod]] while using GPS for overall distance and course. You can only use a footpod by turning off GPS, which is pretty useless. GPS alone is not accurate enough to give you a good indication of current pace, while a footpod can do a much better job. Errors in GPS tend to cause the display of current pace to swing wildly, while errors in footpod pace tend to be constant and far easier to allow for.
* For running on a treadmill, the Ambit3 does a poor job of estimating pace from its internal accelerometer, though I've found that even the best watches don't do well enough to be of much use. A bigger issue is that Suunto doesn't make a Bluetooth footpod, so you have to use a third party option such as the Adidas. The Ambit3 also smooths the data from the Footpod, so if the footpod you use also performs smoothing (like the Adidas), then you end up with a rather unresponsive display of pace.
* The Ambit3 does not have a vibration alert, which is something I miss far more than I'd have expected. The vibration is useful for alerts, as you may not hear the beeping in noisy environments or when wearing headphones. The vibration in other watches is also useful as a confirmation you've actually pressed the lap button.
* Like any complex device, the Ambit3 can occasionally need a reboot. Sadly, while you can shut down the Ambit3 from the menu, the only way of waking it up again is to plug it into a USB power source. This should be a very rare issue, but if it happens to you on or just before a race, you're screwed. (To shut down, press the "Back/Lap" and "Start/Stop" buttons pressed to enter the service menu.)
