I currently own Genius tablet, but considering the purchase of a "Bamboo Pen"; will lose some surface size (does it matter?) and still not sure whether the upgrade is worth the money. How was your experience? TIA.
The tablet feels very comfortable. Stylus feel on the surface is very smooth. The response from movements in all directions (pressure, tilt, move) is very good. The tablet is easly configurable for any application and you can customise its keys and dial to any function.
I can't compare it to Genius, as I've never used their products, but in comparison to Trust, Intuitos is several leagues ahead.
As for size - that depends how you use it.
I prefer to have nearly 1:1 mapping between image on screen to the tablet surface. The XL size (about A3) gives me this for my 21inch monitor.
With bigger surface you have more precise control over what you are doing - like longer sliders in Lightroom when you extend the control panel in Dev module. You can do everything on a A6 postcard, but that will take more effort.
Allan