Has anyone tried Natures Domain Dog food from Costco?

I have found limited reviews. My dogs are cavaliers and are a little overweight. They are on Natural Balance now but the price difference is unbelievable. I want to try it but am afraid it may not be as high quality as I prefer. I have tried wellness, evo, TOTW, royal canin and blu buffalo. With two dogs and losing my job recently every penny saved counts!