I have been using Garmin product for over the past 4 years and I have never encountered such inaccuracy from a Garmin product. Just got a 735xt as a gift for Christmas and after 2 very inaccurate runs, I returned the watch. My Vivoactive 1 & 2 were way more accurate than 735xt. I ran with my old Vivoactive 2 and the new 735xt and the 735xt GPS is consistently short by 1/4 mile. How do I know my Vivoactive is more accurate than 735xt. I used my Vivoactive in 4 Ironman and over 15 marathons and my Vivoactive has been very accurate. I have read messages on your forum and there are plenty of complaint about this 735xt being inaccurate but yet no one offer a fix or solution. I have tried to contact Garmin via chat but no one was available to chat even though your board said that you would be available. Very disappointing.