THIS MONTH MAKES 2 YEARS WITH MINE,I AM A BP FISHERMAN AND CAN SAY THEY STAY GOOD OVER PILES AND LOVE WIND,WORST PART ABOUT THEM IS DO NOT STAY IN FRONT OF DOCKS GOOD ON SPOTLOCK,PART OF ITS BEAM I THINK IS BLOCK,ALSO UNDER BRIDGE ALSO,HAVE TO MANUAL USE IT THERE. USE IT PAST 2 DAYS ON PILES