This is a great price on a great piece of software (I think Neville is around here, but I guess he's too classy to say so himself
This family of software is largely differentiated by how much structure it allows or forces. Surfulater doesn't really force any structure, but it allows you to use more than, say, OneNote. And that's the sweet spot for most of my work. And it costs about a zillionth of the price of the Office suite.