Except for Anathem, which has the most boring, uninteresting start to a book I've ever tried to read. After several attempts I've only made it a few chapters in.
To each his own and different strokes makes the world go 'round, etc. But I found the first half of Anathem incredibly good and the second half (once they left the Math) much less exciting. Part of that may be because I'm a fan and amateur student of philosophy.
The problem isn't whether or not it's "easy to use".
The problem is that it's designed to be easy to use on tablets and tablets are rubbish for doing real work. On desktop machines
That fails to explain why a three-year-old has no problems using it
Two things. First, a three year old doesn't have to unlearn years of expectations of a system acting a certain way. Second, what a three year old is trying to accomplish on a PC might be just slightly different from the purposes of a typical business user.