My 1st 3 cycles were short M1T, 4AD, and 6-OXO for PCT runs. Lots of poeple hate the stuff but i'm a supporter. Over all 3 cycles gave me a total of about 20lbs that I still carry today about 1 year later (also due somewhat to a complete diet overhaul). All my buddies were asking me if I was juiced up.
Sides sucked - lotsa acne and pains in my kidneys towards the end.
I think sucess depends on the brand, Legal Gear gave me terrific gains but Higher Power was completely bunk, saw almost no gains and bad sides. IMO lots of people who tried this stuff went for the cheaper Higher Power brand and had terrible results resulting in a bad reputation for 1-Test overall.