Color Pulse isn't really designed to completely dye hair, but like the box says, to make your natural hair color "pulse". The color recommendations are there for a reason.
I've used it four times; three of those times were successful. It does wash out well (I have brownish-goldish hair) and didn't stain at all. I wouldn't recommend using it for a drastic change (blonde to black, for example), but for subtle change, it works.