It's a good product but kind of pricey. I have been using ON's Platinum Hydrowhey which is the base protein powder for hydrobuilder - they just added the other requisite pwo stuff to hydrobuilder to make it an all-in-one sort of deal (creatine, glutamine, etc.).
I've been pleased with Hydrowhey - just switched back to Myofusion right now (like to mix things up).