“I’ve tried six different ’top’ products. This one by far out works them all! The smell is not overpowering nor does it produce a foul odor when it starts doing it’s job. I think it smells good actually. We used this on a beach towel that was near a litter box. It was aweful to say the least. I put this stuff in a spray bottle. Completely saturated the towel with it but not to the point of dripping wet. It only took two times of saturating it and letting it dry. When we washed it….viola! It was gone. Even put towel in some hot water to test and urea was left behind to recrystalize (that’s what causes the urine to smell horrid. Always wash cat dirtied items in cold water or you’ll have a smelly situation re-emerge.) Anyways, the towel is saved and no worrying about the smell returning. I also saved a mattress topper I bought from someone for super cheap, who had a cat. It took the urine right out! Great bargain!!! My cat didn’t smell anything I know or he would have marked it himself.”