Well I just RMA'd my 3rd comfort belt. My dual belt is doing better but is also showing teens to 20 something errors. I'll probably RMA it when I get the other back.

I dug out my ANT belt (old style looks like a polar) and after bending the + contact out a little and putting in a new battery, 3% error. I haven't seen an error rate that low in months...Suunto PLEASE bring these back!!! The contacts in the belt design of the comfort belt and the comfort dual doesn't hold up!

3/3 Comfort belts RMA'd when they hit 20-50% error
1/1 Comfort dual currently 10-25% error
1/1 ANT belt (old style) 3-5% error

All belts and T6c have new batteries

LOVE my T6c but I hate the reliability of the belts...

-PaulK