For me, optimally 3

This is not my first Wacom tablet. Since 2009 I have a Bamboo Pen & Touch in size Small (CTH 460 / 2nd generation)
However, I came with the tablet never really good clear we were never friends. The "transfer" of the A6 tablet size to a 22 "Monitor's already pretty intense. I could therefore not personally work so well, especially what concerns subtleties.
In addition, I bugged the touch function. When she was accidentally turned on and only a single printer sheet or the mouse cable touched the tray, everything went crazy.
As you wonder then suddenly that the mouse pointer a life of its own, or programs are started, you can type any text or the like - until you get it that the Bamboo is the blame.

Recently, there was now the One by Wacom at an online provider on offer for 59.90. Through a coupon I have only 39,90 EUR paid. For a medium large tray which is an unbeatable price. The old Pen & Touch has cost twice as much.
In some ways, the One is a step backwards compared to the Bamboo P & T. It has no buttons and no Express Touch function. In addition, the pen has no eraser.
But since I have the Express Keys eh hardly used and the touch function was annoying me not missing those two things. On The Contrary! Especially with larger tablets it is very pleasant that I can put the hand on the tablet, have to have that it recognizes this as a touch gesture without fear.

Regarding the lack of function of the pen: I can take it even my old pen from Bamboo. The works and is recognized correctly. Or you put the eraser just one of the two keys. All a matter of habit.

I've worked a lot yesterday and today with the tablet and am very satisfied. It can thus work well. Better than the small. Just subtleties I can now much better draw. I have more space. For me personally was probably a Small simply too small.

What I like best about being One, that it is very flat and no big, wide margins has. That was something that has always bothered me on P & T.

I am happy with the tray and can highly recommend it!