The positioning of the analog sticks is good (whether with my big paws or hands my children) and various buttons fall well in hand. The controller looks very sturdy and the battery takes particularly long (net difference from a Xbox360 controller). In addition you get a USB cable to charge the controller (and incidentally continue to play even when the joystick is discharged).
It is against a shame not to have equipped these levers of sensors in the Wiimote, which would have happened in the past in more games
[Edit] A grincheu was come that this controller was useless "because no there is no compatible game", so here are a list (of compatible games and / or require the Wii U Pro Controller in local multiplayer ) Non-exhaustive dated 28/12/2012
ZombiU
Trine 2: Director's Cut
Mass Effect 3 - Special Edition
Assassin's Creed III (Wii U)
Darksiders II
Tekken Tag Tournament 2
Sonic & All-Stars Racing Transformed - Limited Edition
Call of Duty Black Ops 2
Warriors Orochi 3 Hyper
Fifa 13
Tank! Tank! Tank! (Which I highly recommend to anyone)
PS: I added a small photograph showing a Wii U controller and its Xbox 360 counterpart (often compared, rightly). The Wii U controller is a little wider and a few grams heavier.