Not really as advertised
I've been using this for over a week. What they don't tell you is, although this is safe for lenses with coating, anti-reflective coatings don't work well with it. It does say it in the instructions emailed to you. It does lessen the time your glasses stay foggy but it does not completely eliminate fogging. It is great for cleaning glasses, probably because you use a microfiber cloth to finish the process. I have reapplied every couple of days as it said in the emailed instructions and it has slowly lessened the fogging time but it isn't an immediate fix for fogging glasses. I don't know how well it will work with glasses without the anti-refective eating.
Rating: 3 stars