When I did FCP training, the trainer said "dedicated FCP keyboards with coloured keys are great ... to show the client. But that's about all."
Like LW said, you'll memorise the keyboard shortcuts without the colours. Better to print out the shortcuts and stick that up on your wall.
Having said that, they do look good ... and they're not that expensive... Uh-oh, looks like my alter ego, Compulsive Gadget Buyer, is waking up 🙄