We really liked the look and function of this faucet so we purchased three, one for each bathroom.  The inside of the water spout has a rough finish, probably so that the water flows across the width of the spout, enhancing the look. However this results in the spout staying wet until the water evaporates and then minerals deposit in the spout (we have a water softener).  These can removed with vinegar (recommended by Pfister).  This erodes the finish over time and areas turn green. They no longer look very attractive.