I don't like the Rug Doctor Spot & Stain Remover. It gets rid of carpet stains okay. But it also lightened my carpet on the spot I used it on. I won't use this product again due to it dying my carpet. This is simple to use. It's your usual carpet cleaner, spray it, let it sit, scrub it up. I did just that. It took a little more scrubbing than it does with other cleaners but it did get the stain out of my carpet. This carpet cleaner smells better than any of the other carpet cleaners I have tried. It doesn't have a chemical odor but instead smells pretty fresh and the scent remains after use. The problem with Rug Doctor Spot & Stain Remover is that the day after using it I realized the spot where I used it at was lighter than the rest of the carpet. I have off-white carpet throughout my apartment and I have never had any of the carpet cleaners I've used dye it lighter. It just drives me nuts that there is one circular area that is lighter than the rest of my carpet. I quickly got rid of this carpet cleaner! I do not recommend Rug Doctor Spot & Stain Remover. My main reason is because it dyed my carpet a lighter shade. There are much better cleaners out there that do not change the color of your carpet.