I started using Cardio Surge Energy because I was looking for something to help bring my CrossFit training to the next Level. Everyone claims they have the best product to help you get through those tough training sessions but few actually work and even fewer work without Caffeine. Cardio Surge Energy is one of my favorite products, its safe, stimulate free, and over all else IT WORKS. I take 3 capsules before my training session and I have energy not matter if the session is 1 hour or 3 hours. Cardio Surge Energy has enabled me to perform at my best and even helped me achieve my goal of getting to CrossFit Games. I would highly recommend this product to anyone who wants to outlast their competition or someone who just wants to see their true potential.