my 610 did the weirdest thing. i jogged on tues. the watched never updated. i went to update manually all a sudden my totals are deleted. the tues i ran is not there. i manually went in to garmin connect and put in my miles. these watches are starting to become very frustrating. garmin connect acts up. the mobile app for windows phone doesnt work rite and i have to delete it and reinstall the app. now the watch delete things out of no wear. ive been through 3 different garmin watches and it seems like they dont hold up like they should. i was thinking about trying another company but when its working correctly the watch,app and garmin connect are good . i look at those newer ones they and sometimes think about getting but i know would on fire if i paid 400-500 and thses things would happen.