I'm in the Darling Downs, Queensland.
I've been using the tattler lids (both regular and wide mouth sizes) for about 4 months. Once I figured out to not tighten the band down overly tightly before processing, I've had no problems with them. I tighten them regularly, then loosen about 1/4 turn, which has greatly decreased my non-sealing failures. I"ve used them in both water-bath and pressure canning.
They wash and re-use beautifully, and best of all! they're BPA free!
Hope that helps!