Personally, if I had the money, I’d stock up on all the Low-Carb Grow! flavors, Power Drive, ZMA, and Surge, a year’s supply of all three. Each year. Forever.
Unfortunately I can’t even afford a month’s supply on this damn college budget. So I get Power Drive and ZMA because they’re both very affordable every month, and IMO, indispensable. I was just home for a month between semesters with no Power Drive or ZMA and my workouts/recovery suffered noticeably.
So until my income increases, it’s Power Drive and ZMA, plus custom blend proteins from another site, that, although they’re more affordable, taste pretty good, and have very similar ingredients, are no match for Low-Carb Grow! and Surge.
I’ll be trying regular-strength HOT-ROX (again, more affordable) for the next while, since I’m cutting a bit of fat, so depending on the results I might have to add another to my list.