I was taking Shock Therapy, I believe a similar product, and the first few times using it was great. Putting up slightly more weight and reps then normal. Everything was good using it I was downing atleast a liter of water before/during/after my workout. Then I went a few months without using it much and last month started up again. It made me extremely jittery and anxious even though everything else I did the same. Felt like I was going to have a panic attack.
No more for me, sticking with whey protein and a good diet.