I liked Bullnox a lot. IMO pretty underrated, for no 1,3 the energy complex rubs me the right way. I didn't notice any test boost but the focus was more aggressive than others I have tried; to elaborate, most pre's i try differ in types of focus, like, aggressive (bullnox, rage), determination (LITup), etc. Also tastes great. Only slight downside IMO is the huge serving size.