Tummy problems?

I saw a new product the other day. The Deidre's K9 catalog has a product called Tummywell. It allegedly contains enzymes to help pets digest their food. The website says: "When taken with a meal, these supplemental digestive enzymes are completely dedicated to the digestive process, and help the body effectively break down food into nutrients the body can use. When taken on an empty stomach, the same enzymes help restore and maintain healthy blood and tissue functions, and can have a beneficial effect on immune and inflammatory processes." The chews also contain vitamins and minerals.

I'm curious. If anyone has a dog with problem tummy and has tried the product, I'd love to hear from you.