After 2 months of use I am very happy with this GPS watch (2 week) Trace accurate GPS (even one borrows dirt roads). Heart rate monitor handy to progress. This will work its effort zone. The strap is comfortable and does not interfere during the race. The attachment of the GPS is quickly (between 30 sec and 3 min. It depends on whether the weather is overcast or not) The website allows Carmin connect to analyze the information collected by the watch, prepare his workouts, his routes etc ... Simple effective. The refund offer has functioned well, I have had the 50 reduction.