I haven't tried rpg, xtend was a staple of mine for a long time flavor and mixability was best until I tried iBCAA, beat xtend in mixability but not in flavor. Been seeing some guys mix iBCAA's with vitaberry, how is the flavor on that, not too strong? I prefer a watered down flavor during the workout, usually half strength crystal light does it. Looks like vitaberry is 60 servings, would 1 serving do it for 1/2 gallon of water with iBCAA's in it?