I'm on VPX's CEX and it's awesome, I've taken prolab's mono and V12 as well and this blows it away, granted it's a bit more expensive but I look at it like this, I only take this pre workout, i take mono post workout, and I only take it on workout days, it lasts quite a long time when you use it like this and the results are great, a lb, max 2 of bloat from it, but i really dont think i got any, and the crazy thing is, I was on it for about 4 weeks and got off just for shits and giggles to see what would happen....my strength jumped again when I got off, I can't wait to get back on and see what happens, I really love this ****, and the pump I get from this is just as good as straight L-Arginine or Nitrix, i look real swole relative to my normal self after I lift