Works really well
This stuff is pretty amazing, I was laughing! I had years of hard water build up and the glass was practically opaque. After using the polish it is crystal clear! I had to go over a couple of times but if you don't have years of build up it would work very quickly and easily, no hard scrubbing. I did find the packaging annoying as it's in small sachets but that is probably due to the product losing effectiveness once opened. Highly recommend!