I've owned four bows with Barnsdale Ultra Carbon limbs over the years and none have given me one bit of trouble.
One is a 1999 Bowman Accu-Riser I; the Barnsdale limbs on it still look and perform superbly.
Stewart Bowman refused to use anything less than Barnsdale on his bows.
Stewart had a lifetime warranty on the Barnsdale limbs, because he knew their quality was unsurpassed.