The absolute best feature of the r10 is when it falls asleep 500 times during a session. I can actually feel myself getting worse using it, because I rush my shots hoping I can get one off and it be tracked before the thing Falls asleep. I wonder if Garmin will replace the on-off wake up button because I can tell it is about to go bad because I've pressed the damn thing so many times by now. And I've only owned the device for a month.