I'm halfway into my fourth ten pound bag of Penta-Pro. I use the plain penta-pro powder, vanilla flavor, sweetened with Splenda, and with no added carbs or fat. It tastes OK, maybe even pretty good, and mixes easily. I like the idea of blending five different types of protein. I've had good gains with the stuff, but I've really been concentrating on diet like never before too, so I can't really say I'm sure it's the protein. However, it's definitely a good protein powder. I'm about ready to try something new just for a change of pace. I might try Dave Draper's bomber blend or Spellwin's powder next.