Neal Stephenson's FALL is worth reading despite its length.
That's my take on it after going a few rounds with myself about how I felt. The book is long. It covers a LOT of territory in this world and the next. It also covers a lot of conceptual ground. Mortality, memory, identity; all of these are woven together with a global technological and social culture that feels very plausible if not inevitable. The first act takes place entirely in a world that feels a bit like the day after tomorrow - focussing on our digital rights, the plague of the current internet, and the art of the possible. But the first act, grounded in reality as it is, is simply a set up for the mythic world Stephenson creates in acts two and three.
Does Stephenson spend too much time describing unnecessary details? Yes. Does that detail payoff in important ways as you get deeper into the story. Sometimes. Maybe the problem is that often that detail doesn't become important often enough that the reader starts to feel like they're being strung along.
But Stephenson's voice is interesting even when he's just describing the veins in a maple leaf. And ultimately that's what saves this book from it's own length. Stephenson is an interesting cat and the concepts he examines in infinite resolution are interesting as well.
I wouldn't want to be his editor.
But, while it was a long read, it was enjoyable.