I tried Deca for teh frst time this last four months and it was great. I was concerned about all the 'bad press' about it, but it went fine. And I was only hovering around 3800-4000 cals a day. I am going to throw it in again at the end of summer at 600mg again and go for around 5K cals a day. Even though my cals were lower than they normally would be, I gained almost 12lbs of lean mass!!