Weeelll, I couldn't find anything called Performance Edge... turns out it is Premium Edge

Here is their website
http://www.premiumedgepetfood.com/ And yes, it looks to be a good food.
Here's the ingredient list for their adult chicken/rice/vegetable formula:
Chicken, chicken meal, whole grain brown rice, cracked pearled barley, white rice, turkey meal, chicken fat (preserved with mixed tocopherols), oatmeal, potatoes, millet, egg product, flaxseed, natural chicken flavor, kelp, carrots, peas, tomatoes, apples, cranberry powder, rosemary extract, parsley flake, potassium chloride, salt, choline chloride, dried chicory root, glucosamine hydrochloride, vitamin E supplement, iron proteinate, zinc proteinate, copper proteinate, ferrous sulfate, zinc sulfate, copper sulfate, potassium iodide, thiamine mononitrate, manganese proteinate, manganous oxide, chondroitin sulfate, ascorbic acid, vitamin A supplement, L-Carnitine, biotin, calcium pantothenate, manganese sulfate, sodium selenite, pyridoxine hydrochloride (vitamin B6), vitamin B12 supplement, menadione sodium bisulfite complex (source of vitamin K activity), riboflavin, vitamin D supplement, folic acid.
The lamb formula is similar, but excludes the turkey meal and is a little lower in protein, fat and overall calories.
What I like about this food: It has a respectable amount of meat (top two ingredients, even if one of them is meat inclusive of water content). The major grain in the food is a whole grain

. The fat ingredient is not in the top five. It has a respectable range of fruits and vegetables. Overall, it's pretty good and deserves it's place on the WDJ (more than several others do).
One caution I'd make though (a general one, since I don't believe it's actually applicable to your case), is that I think the puppy formula is a bit overloaded - it's a 29% protein and a whopping 18% fat. They do not disclose the calcium content. Thus, in feeding this food to a puppy, I'd recommend using the adult formula.