I used it my first cycle, but at 750 mgs a week along with 300 deca and 30 mgs dbol a day. Needless to say, I put on a lot (30 lbs.), but it was overkill. Super Test is so cheap that you can easily make up for underdosing by just doing more. If you figure that at the very worst it's 25% underdosed, you can just factor it in and do more (i.e., if you were going to do 500 mgs a week, do 625 instead). There are definately much better products out there, and if you're going to go with vet stuff Denkall and QV are the better choice. But if all you could get is SuperTest, just take a little more.