I fed it for about a year. The dogs did great on it. I would still be feeding it if the only store in town that sells it did a better job of keeping it in stock!
I have fed the puppy version to my puppies and like it very much. However, it has a lot of ingredients, and I wonder about using it across the board; if allergies develop to the food, you will never be able to figure out the allergy out. I feed a simpler food to my adult dogs--California Natural Lamb and Rice.