So did a months trial on this product, as it took me a few week to start feeling the effects. I can honestly say my energy levels was seriously increased and my focus levels was higher, also my recovery between training has improved. I then took a 2 week break to see if it made any difference, I can honestly say it did. I felt tired again in afternoons with out it. So I got back on it, then within a few days I felt energetic all day and back to one coffee per morning. I basically describe this as an all day pre-workout that lasts all day. No bulls**t, it’s worth every penny. I’d like to see a monthly subscription rather than a bulk buy. Overall, it’s awesome.