Mine's whatever the old batch number everyone had earlier in this thread (I don't remember it offhand). It's definitely strong for me. One cap, and after probably 20-30 minutes I get a lot of energy, but it's sort of "harsh/dirty" for the first few hours, then it calms down a bit for the next few/several hours where I still have a lot of energy but it's not jittery/crazy at that point. The first few hours are sort of "too much" to actually get a good lifting session done with, but is good for doing yard work, cleaning, etc. After those first few hours, it's fine to go to the gym with. There's also definitely a thermogenic feel to it, as I do seem to sweat a bit more when I use it.