I prefer to see the first 5 ingredients as meat sources, and preferably not meals. PURE Sky should have comparable glucosamine/chondroitin levels. Also, I use Cosequin DS for glucosamine and chondroitin just to guarantee that I know how much they are getting.
Nothing in particular that I don't like about ALS, it just isn't *as* good of a food--more ingredients/chemicals/supplements, less protein, need to feed more for the same nutritional value (and one of mine is a pain to get to eat at all). Preservatives in the grains can cause trouble for allergy sufferers, and one of mine is strictly grain-free, poultry-free, allergic to everything But if it works for your dog then it is a good food, and you could certainly do a lot worse.