I have a lot of pieces acting as locks so things don't flop around. In some areas, it can easily move improperly, but he doesn't just fall apart right when I pose him. A lot of it is peg based, not just brick attachment based.
Well if you are going for the junky, spiky look, which I assumed you were from the title it's perfect for that. I always have had the hardest time with joints, that's why my Transformer models have only become large recently, otherwise they were only a bit larger than minifigures.