I have been using this product for about 3 years now. We have 4 little dogs and they have accidents. Some are pretty messy on carpets. I have just placed another order for 2 more gallons. It lasts quite a while. I LOVE IT!!! It works fabulously on hardwood floors as well. You won’t be sorry. Have saved a lot not having to replace large area rugs. Use the black light as well that picks up the sight of urine stains. Spray the areas well and the next day try the light again and the stains are gone. I am a very faithful user of this product. Thanks guys!!