I've had real problems with pre workout in the past. I work out between 2&4pm so don't want something so loaded I can't sleep. Sadly the 'BSN no-explode was at the other end of the scale, just a bit of a skin tingle....full stop, no further boost at all. Had the same with ON product as well. I need something that tells me I want to be in the gym, sadly not this one. D