YES!!! IT WORKED!!! I used it on old cat vomit stains (sorry to be gross), old cat urine stains and an older hot chocolate stain. I also used it just yesterday on a new stain. That one is still working through but I’m confident it will be removed completely. Odors have also been 100% removed. 
I have a newer (less than a year) light beige carpet that I’m using this product on. I’m extremely happy with the results. Have been using Nature’s Miracle and Carbona Carpet Cleaner for years. Neither ever removed stains completely. But this product did!! Thank you!!! It really works!