It has been the best thing I've use so far to keep my glasses ...
I would give it a solid 4.5 if I could. It has been the best thing I've use so far to keep my glasses from slipping (of which I've tried many things and had the eye doctor try and just fix my glasses, but apparently I have a weird nose bridge). I mark it down a bit just because it is messy and I have to reapply it too often (Like, once every two hours). Somehow I always seem to get a spot on my glasses and then it takes a bit to wipe it off (Doing it the way Don says to do it on his video).
Rating: 4 stars