I have had this for awhile and it is a great device for making sure you have extensor action in your swing. If you do then your left elbow (if you are right handed) will not cause it to "click" until well after both arms straight.
To be honest with you I haven't used it in awhile even though I keep it in my trunk. I really like the tic tac devices cause they are easy to use and they give you instant feedback...it has really helped me with the FLW (out of the 3 imperatives this is the only 1 that I am fairly consistent with).
I haven't tried the right link so I can't really compare it, but I think the tic tac elbow can be used with a hitting pattern to make sure you have extensor action.
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