I had three sample packs that I tried and to be honest it's the best pump product I've used including High Volume. While I really enjoy High Volume, which has better dosed ingredients, for some reason I got better results off the Allmax product. My diet etc was fairly consistent through this period so I don't think there was other variables at play. Not sure why I'd respond better. Will buy it in future, but still got some High Volume to get through (bought 6 tubs).