I know you guys all seem to love the Lyndall Z Plus pads....but I bought some for my '09 SG at 20,000 miles. My stock rear pads were (at 20,000 mi) at the point that they'd have to be replaced within 50 miles or so. My fronts still looked new....which is odd, as I use more front brake than rear.
Replaced all three sets with the Lynall Z Plus pads, and instantly noticed a huge reduction in stopping power, and increase in brake noise. I figured it was due to them needing to be "seasoned" or broken in.....so I waited to pass judgement until after the break-in period....and I stand by my original opinion. Much noisier, less stopping power. Not sure if they last longer than my stock pads, but at 40,000 miles, the Lyndalls are coming off, original stockers are going back on the front, and a new set of stock rears are going on the back.
That's my take on it. Feel free to tell me I'm full of chit and don't know what I'm talking about, but I put a ton of miles on, mostly two up, and often hauling a trailer, and I effing hate these pads.