My experience...
...with Winchers has been positive, like I said. I've been out in 30 knot gusts - nearly thrown overboard by wild heeling - but the Winchers have not let go of the sheets.There's definitely mixed opinion around here as to whether they work or not - my guess is proper sizing is critical - there may also be different winch finishes to which the Winchers don't adhere to well. Who knows? It's worth a shot - if they don't work, take them back to West Marine for a refund, or a credit toward new, self-tailing winches.