Hi There,
I can't speak highly enough of these braces. No, I'm not sent here for advertisement on their behalf.
Don't get anything other than radiance. I can't speak for the other brands, but I've seen ALL sorts of other ceramic etc. braces, and none come even CLOSE to looking like the ones I've got. I see people with white ones, ceramic ones, and semi-transparent ones--and man, I just feel bad for them.
People with the metal ones, I just think "what on earth was going through their head?"---not only do radiance look fantastic, yes, I think it actually makes my smile look better. Makes it sparkle more.
I only, only use the clear ligatures. they DO change color, absolutely, no questions. They will turn yellow in about 2 weeks, but it's highly dependent on what you eat. For example, curry and hot sauce will turn them yellow in1 meal. I've gone two weeks however, without them turning much yellow by eating.
I actually change my own ligatures at will

SHH!! I won't explain--but I'm a salsa dancer, and I can't be going around with yellow ligatures. So I change them maybe once a week--saves a trip to the dentist and it's really simple honestly.
Anyway, for you all I assembled a collage of me. No I don't have a million girlfriends, but it's me with girls because I salsa a lot

One of them though, IS my girlfriend. See if you can figure which.
I have much closer shots as well if you want.
oh! you should know there are a few things they don't tell you.
When you get braces they change the arch wire, which is the wire that the ligatures (little bands) hold in place. The arch wire comes in a variety of types and sizes--some are square, some are rounded, some are weak and strong and they vary in thickness.
The thicker, the more visible. In the Radiance marketing, the girl has the tiniest arch-wire I've ever seen. Mine is much bigger--but still, you can't see it anyway.
Get your teeth whitened BEFORE you get them put on, and also get any cavity work done before they get put on..
Here is a collage of photos of me.
http://picasaweb.google.com/lh/photo/XN ... directlink
get radiance! thank me later.