This product is such a great idea.  The only issue I have with it is the fact that in order for this product to work correctly, you have to make sure the tie tag falls perfectly in the middle between two of your shirt buttons.  If the tag is too close to the top or bottom button, this plastic tiedown will either pull your tie too tight at your neck as you move around, or cause your tie to crumple a the mid-section of your shirt when you sit.  Tie pins, although a death blow to a good silk tie, usually have a chain that is long enough to allow for this type of tie movement and still keep the tie in place.  These plastic tiedowns don't allow for the same amount of latitude.  In any case, I continue to use them, as I hate destroying my ties with pins and can't ever seem to keep a clip in place.  This item is RECOMMENDED.