So far it basically works
So far in the little time I have had to use this, I can say it basically works.  Recently because the weather has been warm I'm not able to fully rate this item.  I would bet that it doesn't work for the number of hours claimed.  I did notice some blurring in my vision which I assume is the chemical trying to prevent fog which made the inside of my lens wet.  I haven't completely given up on this item and will keep using it until I can know for sure if it works.  I don't have specially treated lenses but please I'm almost sure this will destroy that coating so check with your lens specialist before you use it
Rating: 3 stars