Bang and Reign are my favorite and are virtually identical in ingredients and flavors. The cotton candy is AWESOME! The Bang birthday cake sounds f*ing disgusting, but it’s actually really good. As far as energy goes, it’s a ton of caffeine and taurine. Nothing magical.
Every once in a while I get a bang or reign but I'm a cheap ass. I prefer to buy the Walmart brand crystal lite packets that have caffeine. Each packet has 120mg caffeine in it. I put 2 in a my water bottle and I'm good to go. Plus it makes me have to drink 32oz of water to get 240mg caffeine instead of 16oz with a store bought energy drink. It's $1.74 for a 10 pack and they have like 10 flavors.