update - I've had rear pads on my daily driver 06 Jetta for about 18 months and 55,000km... Decided to replace them as they had about 5mm of pad left on each pad, I was also getting a cold squawk on initial application of the brakes at the 1st 2 stop signs on my morning commute... sometimes also on my afternoon commute as well.
at 5mm, the pads had about 30% left. Ideally I could have probably gotten another 10-15,000km out of them, but I don't think my jetta likes worn pads - I start getting symptons of sticky calipers/parking brake mechanism/ occasional hot rotor.
When I removed the pads, I noticed the pad material was beginning to delaminate from the metal backing plate, this might be causing my sticky brake issue and cold squawk. Could be rust/corrosion from being winter driving in the snow belt.
Anywho, replaced the pads with another set of ABT's at $53 cdn for a set from my local garage, it's a good deal.
I'm tempted to try them on my 01Boxster S if they make it for that application, but right now, I've got good pad remaining on all 4 wheels when I checked about 1 month ago. Love that they don't dust much.
Peter