It didn't work for heavy Arizona hard water stains on glass shower doors. Shined up faucets though!
Product did not work on removing seriously crusty hard water stains.  However, it did polish up my non stained faucets. I was looking for a serious hard stain remover.  It is a clear liquid with a nice spray head. I think that if you don't have a heavily hard mineral stained problem, this product would probably keep the stains away. Low odor.
Rating: 3 stars