Remember now, everybody's body is different and reacts to each supplement differently. I saw huge mass gains while taking No2 Black. It was a great product for me. Shop around, do research. Find what works for you. I recommend this to anyone who wants to build muscle and strength.
I started with NO2 Black 10 weeks ago and my weight was 175. Im now 180. 5 pounds of lean muscle in 2 and a half months doesnt seem like much to me. Ive not missed a day in the gym working out 4 days a week. I have seen a lot of gains in strength but Im not sure I can attribute it to the NO2. Ive stacked it with ISOpure low carb protien CE2 and NO Amped. I eat 6 times a day taking in 2500 cals a day and no cardio. Im switching to Prime for 6 weeks and off NO2 Black.