I really haven't used a PWO for months. Used to use them regularly and was always a 2-3 scooper but had a couple of workouts where PWO was rockin' but just had disappointing workouts. Plus their easy to become too dependent on. IMO really don't make a massive difference unless you're really tired or dieting, when they can definitely extend your endurance. These days will use a blend of - creatine, glutamine, beta alanine, AAKG and citrulline, taurine, occasionally something else if on hand. I suppose it's effectively a non stim PWO. Don't get me wrong stim based PWOs certainly have their place, but maybe not every day....