The TouchWiz UI is plenty speedy, the browser was about as good as you could expect a Samsung dumbphone browser to be, we had an easy time adapting to the landscape QWERTY keyboard (and the numeric one, for that matter), and -- this is a biggie -- the screen felt really good.
An interactive window appears midway prompting viewers to contribute to the landscape, typed on a keyboard or drawn with a mouse, which extend into branches and attract a flock of flying birds.