All those aids work to varying degrees but why not address the real problem for most golfers who flip - why are the muscles in the right wrist and forearm creating the flip in the first place and how can we learn to inhibit that muscle contraction? There are several root causes but the main one is the mistaken perception that you must make a sideways across the chest motion with your upper arms, lower arms, wrists/hands and golf club during the Impact interval. If you truly understand Down Force, ie lever action down towards the ground - not directed at the ball or in the target direction, you will never flip badly again.
Jim Waldron