Best workout Ive had in a while. I popped a 200 mg caf pill about 20 minutes before I went to the gym, mixed 6 scoops of xtend in a half gallon container and sipped while I worked out. I kept the mp3 player cranked with some good heavy metal and rock. It was a great workout, I able to push those extra 2-3 reps per set and I finished my entire workout in good time. Most of my numbers even went up a tad. Not sure how im going to fall asleep now though its 11 pm I highly recommend it.