First off, to those who have candles that are frosting after using this product - this is a UV Inhibitor, not a frosting inhibitor.
After using this product for over 2 years, my feelings are it's does what it's designed to do. I've been fortunate that my candles sell rather quickly and I've not had problems with my inventory yellowing. I have noticed that I may need to increase the amount I use as I've had one candle (yes only one) that yellowed which I had in stock for over a year. The candle was not colored and poured into a colored glass container using GB 464 wax. Again, my experience is the product does what it's supposed to do.