My Garmin heart rate monitor has been flaky lately. It's been reading over 200 when I first put it on and other times really low, under 100 when i'm riding. I replaced the battery even though the old battery still showed 3v. I regularly clean the strap, wearing it into the shower.

So i called Garmin customer support to ask if I need to replace the strap. I explained that it was 5 years old and i used it with my 510. The service rep couldn't say if replacing the strap would fix the problem so he offered to send me a free replacement.

So today it arrived and he sent a complete unit, strap and HRM.

Now that's what I call service.