Depends on the price, but I'd give it a whirl. I used the Microsoft's Sculpt keyboard and mouse at work for a while and really liked it, especially the mouse.
I can see this type of keyboard being good for people who are learning to type, or want to improve their typing because their hands are always in the correct position, so they are less likely to use their right or left hand to type on letters for the opposite hand or look down on the keyboard as much when their typing has improve which can slow down their words per minute.