i have been taking RPM since it came out. Its more than just a stim if you know your body you will feel it. I only take on training days but I also do not have other caffeine. soon as i start training...Bam........there it is. If you want a pre-workout i think this rocks, if you just want a stim to train on buy a 4.00 bottle of caffeine. Pre workouts are so hard to judge as daily distractions and other factors can play a part, such as meal timingt etc.just my .02










