Hi,
I have used Nupro. I used a whole big tub of it on my two furbabies. I really did not see much, if any, of a change in their coats or anything.
I know it is less expensive than Missing Link, but I would not buy it again.
I've now started the two on Missing Link about a week ago and am waiting to see the results. You give them much less of the product than the Nupro. I bought it online at PetVetDirect. The prices there are better than any store around my house.
I'll let you know!
omega