Fantastic, you can colour your driver to your choice... In the place that you can't actually see it... Genius (sarcasm DefQon 1).
There was a thread on here a while back about the concept. Would have been better if it was the crown that you could customise and not the sole.
If the club is the correct one for you (flex, weight, loft etc) and you wish to make a statement about your clubs then they are a great idea. Afterall, there have been plenty of threads on here over the years about what colour grips people should have. Also Bubba has made Pink drivers fashionable for some.
However, considering the fact that many people think a white driver is OTT I can't see too many people choosing outlandish colours.