I'm 90% done with The Way of Kings by Brandon Sanderson.
It's fantastically written with a really interesting world, but my main gripe is that it's 3600+ pages on my phone (which translates to about ~1300 print pages, though I'm sure I'm off) and the sections of the book switch main characters. All of the characters are interesting and well-developed, but it takes a while to get through each major section so by the time I get back to a certain character, I might have forgotten what they were doing or how they got to where they were. It had me wanting to skip through chapters just to read about one of the better characters in the story.
Other than that, it's a great book, and I would recommend it to anyone who likes a really long book.