I switched to Victor earlier this year because of the Diamond Foods issues and I absolutely love it!
My Saint Bernard, Daisy, who has allergies (as well as Addison's Disease) is on the Grain Free- All Life Stages (red bag) and it is doing great with her. Her coat looks great and I have actually started supplementing with coconut oil less. Did you notice its 33/16 ratio? Daisy is very active, but I could see how this might be too protien rich for some dogs with slower metabolisms or less active lifestyles.
My Pittie, Kohl, who seems to be only intolerant of corn and wheat, uses the non grain free Performance/Joint Health, (Green Bag) which has the Glucosamine supplement. He has bad hips, so I still supplement on top of that but I think any little bit helps. Its 26/18 ratio is just right for him, because he cannot run nearly so much as Daisy. (We run with them seperately so that he doesn't feel bad; isn't that just pathetic?)
All Victor foods are corn, wheat, soy and gluten free and have no GMO grains.
Its made nearby to me in Mt. Pleasant, TX and its artificial preservative/color/flavor free. Both dogs enjoy eating their food and will eat their share happily and quickly.
Side note: I am not sure how it is distributed where you live, but here it is only in local feed stores, and random ones at that. You may want to shop around because I have paid $32-35 for the GF bag and have seen it at other feed stores for $49.
In short, my results have been great.