I purchased a Garmin Forerunner 220 a few weeks ago and have had major issues with it despite downloading all the newest software updates. I actually returned it to REI and got a new one which still has the same issues. It is anywhere from 2-20 seconds off pace per mile (after multiple tests both against other people's harming, phone apps and just using a regular watch on a marked mile). It also gets further and further behind at a rate of about .02 per mile so that by the end of a run it will be .2-.4 miles short. Has anyone experienced similar issues and have any suggestions for a fix? I'm about ready to return it and try something else...