Happy Home laundry detergent

Saw the demo with 2 fabrics with stains. Supposedly Happy Home dissolved the stains on one while a name-brand detergent did not remove the stains.

I have always heard the removal of a stain is best as soon as possible. So, I wonder was the Happy fabric a very recent stain and the other fabric stained for several days before washing?

Has anyone had success with older stains using this product?