Week and a half 'til I was down to backing! Wasn't happy at all! hgaha Yerr mate they're stupid on a smooth rim, may take slightly longer to bed in, but when they do, wow!
I'm pretty sure the colour of the old ones was a darker yellow, as I had some and they were almost a light orange. And the old ones will last years on a decent grind, new ones will shit themselves within days. Old ones are harder too.