Leviathan/DCP has kept my weight exactly where it's at and I'm a little leaner. It's not as effective as I'd hoped, but I am seeing results.
I'm on Leviathan/DCP, Drive/RPM, Sesamin Oil, Sesathin and Fish Oil.
I would use Leviathan/DCP again in the future, because it did maintain my mass during a cutting phase, but it didn't cut as much as I wanted to. If my primary purpose was bodyfat loss, I would try something else, but if your goal is muscle maintenance and some fat loss, I think you'll like Lev/DCP.