A rather simply and easy toilet bowl cleaner to use--what one isn't, really?--you will get lite to tough stains off the inside of your porcelain bowl with this cleaner. Its also an eco-friendly toilet bowl cleaner. It has a very light substance to it when compared to other cleaners. Specifically, it doesn't foam up when cleaning and it doesn't have a heavy stream in application. But, you will know that it is working when you see the stains and odors go away. Believe it or not, the scent for this Seventh Generation cleaner actually smells good. 5 stars.