Funnily enough I have been thinking about doing this. It's the cost! I had braces as a kid. I pride myself on my teeth. It's the one thing that I get external comments on. But one of my front teeth has shifted slightly, meaning from some angles it looks really squint, from others it doesn't. I've become sort of self conscious about it. Which is daft. I'm still pondering it. As it is expensive. Hmmmmmm