Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Quality Energy Bar!

I've tried these a couple times now, and first of all, they are delicious for an energy bar. Second, I've eaten them before and during workouts and I really do notice a difference in my energy level and stamina. There's no stimulants in it, as far as I can tell - and I don't feel a caffiene buzz or anything, I just notice myself motivated to keep going at times when before I definitely would have stopped. It's really fascinating! Plus, I didn't feel any gnawing hunger to consume high energy (meat, cheese, etc.) stuff at the end of the workout like usual. I'm a skeptic when it comes to different health fads and supplements and stuff, and this looked sorta like one of those that looked fancy but just were a waste of money. But after this second time of trying one right before a workout, I'm convinced this is quality stuff, and I just bought 2 dozen more!