I have ordered bulk unflavored whey protein isolate. The product mixes wel, and has no taste. It's packaged in resealable bags, and comes in 2.2lb (1 kg) bags. I have since ordered casein and L-glutamine from them. They have very good customer service, and very good, maybe even unbeatable prices. Shipping in the US takes just a couple of days. I use their products to mix my own protein shake formulas.
Like i stated above, the product meets my expectations for unflavored whey isolate. Mixes well, no clumping, no bloating. I mix the whey isolate with cocoa powder and a bit of dextrose for flavor, and rice or tapioca flour for carbohydrates. Not sure what else to say except that i am very pleased with their product, and will order again from them.