Missing link supplement?

Does anyone use this supplement? It is supposedly really great!

http://www.petsmart.com/products/product_11869.shtml

I was thinking of adding it to my cat's foodie!
Thanks in advance!!

I use the Missing Link for our Bobcat, but I make her an all raw meat diet. If you feed your cats a good high quality food, some may argue wether a vitamin supplement is needed, just as with people. I myself, take vitamins and I eat a pretty good diet. I have not been sick in a long time...knock on wood...so I do believe there is some benefit to taking vitamins by helping the immune system. If anything, giving your cats the missing link can't hurt. They may not like it though, depending on your cat.