I'm considering getting the new Garmin 620 as my 310xt is currently driving me crazy where it locks up when I turn it on.... spends forever on the Garmin screen or the Off screen logo.... sometimes 20-30 minutes before it comes to life...
Question is - should I wait for the 620 or just get the 910xt now? I only use it for running...
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If for running only, wait, 910 is brilliant for swimming in pools but as you say you don't need that or the multi sport function
Also how Long will you be running?
620 will do 8 or so hours. 910 about twice as long