Improvement cd disc?

A few days someone post a cd improve disc this goes on top of your cd and comes in different thickness,my player is a sony high end player good transport not the best but is fine and looking for advice before buying.
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Those things can get caught in your transport too easily. Unless you have a top loading transport that doesn't move, I wouldn't bother with them.
I second Zd542's opinion.
Thanks also for the advice.
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Hi,where could i get more info about the marigo? Any info about the thicknes of the disc? Price on the marigo disc ?