I've never been one to trust Optimum, or any other company that puts out bulk whey. I just feel that when you get as much as you do for as little money as they charge, something has got go give, and trust me, they aren't just giving this stuff away for nothing. As far as I'm concerned, you get what you pay for in most situations. With a lot of supplements, unfortunately, you pay more for the company, rather than the product (MuscleTech). Though, a company like Next Nutrition or Met-Rx, I feel is more reputable and makes a higher quality product. I don't regret spending a few more dollars if I know it's on a product that's worth it in the long run.