This product works. Period. When I take the capsules I get a lot of energy for workouts. I easily do more than I would without. I've been taking 4 capsules 30-35 minutes before working and it works great. I've been noticing some results, and I'm feeling great. Not really any side effects, but you do have to drink a lot of water, which makes you pee a lot. But overall, a GREAT product!