Is this the slickest todo app ever? (wunderlist)

What's your favourite todo list app?

Up until recently after spending a lifetime using countless todo list apps on various devices I would have stuttered when presented with such a question. But not now. Because I have an answer. It's called Wunderlist.

Wunderlist - a serious slick todo list, task management app for PC, Mac, Linux (through wine), iPod, iPad, iPhone and Android (soon).

What's your favourite task management app and what do you think of wunderlist?