Awesome stacker to add to your preworkout. I gave it four stars solely because I had to take two capsules to actually feel it but once it kicked it was definitely noticeable. Great for anyone implementing high volume training into their protocol or if your just having fun and trying to get a good pump. You tired this both as a stand-alone and supplement to my PWO and I definitely recommend it as a stacker. All in all, great product as a stacker, And very affordable through Suppz.