I tried No2 for about 2 months about a year ago. My friend and I were lifting together before he moved to Florida, and he has always been stronger than me. I was taking the No2 secretly and before the end of the second month I was outlifting my friend and keeping nice solid pumps. I had to go off because of $$$issues. Stuff ain't cheap. Plus I started back to night school so had no time to go to gym. Just bought a Smith machine and am getting ready to try No2 again with Pure cee. I went to GNC last night and bought Ed Byrd (the creator of NO2) 's book "the Nitric Oxide Revolution" for $1. Very informative. I'll be starting this in a couple of weeks and I'll post what results I get. By the way, according to the book, the No2 that is out now is generation 3 with a new delivery system so this No2 should give me even better results than I got last time. By the way, you can order NO2 from getno2.com for less than u can get it at the store and u get a copy of the book for free. And no, I'm not associated with the company - though I wish I was (FREE NO2!) Just a satisfied user of one of the products that truly delivers just about what it claims.