I have a much older Wacom 9x12 pad+pen on my desk. It's too big for me and just ten minutes ago I was looking at smaller models, but as I find myself doing more and more precision editing work, it's a fantastic tool. Technically, I'm amazed by it, as it has a pen (with no battery in it, yet it only responds to that pen) and a mouse (with no battery in it, yet it only responds to that mouse). Artistically, there's a certain amount of hand/eye coordination necessary: you'll always find me slowly lowering the pen towards the pad until it detects it, at which point the cursor jumps to that relative position on my monitors. I then have to reposition my hand as desired, and move my way in until I finally make contact and start my actual editing.