My friend has them on his mercedes, and they are nice! They light up blue as well. People spend a lot more money on a piece of artwork they probably never look at more than once a year. These, everytime I get into my friends C320, I notice them everytime, and its pretty damn cool. My friend said a guy at his work has them light up in orange on his audi S4 and has the orange rear lights as well, getting closer to ricer, but its looks hot he said.
I think I may get them on the 330ci when it comes out... but i get a discount =)