Sure I'll elaborate. It is really nice to have an ergonomically designed controller for the hand that controls VV3 (or any other program). The keyboard is good, but you need to search for keys to execute functions. I started out using VV with the ShuttlePro right away, so I never got used to using the keyboard.
My take, if $99 isn't too much for you, buy it cause it is easy to get used to and you'll get productivity and enjoyment (yes, really) out of it. If $99 is a lot of money to you, and you like the keyboard, stay with it (you save $99!). How's that?
Is there a website you can refer us too, so we can read more about it? I had thought awhile back that it would be great to be able to assign certain keyboard keys to an external controller. Is this what the shuttle pro does?