It was definitely an interesting story, though it could be a chore to get through at some points, and I'm still kind of trying to figure out if I actually like it or not, or how much I actually really understood. It definitely won't appeal to many or even most people, I'd say. Its a heavy, somber experience, very little humor.
I will say, upon starting a re-read, it felt like nearly every word/sentence/paragraph in its initial chapters were impressively thick with double meanings, foreshadowings, and themes that only really become clear after finishing the story.
PS - the audiobooks are really well done - the narrator is just perfect.
PS - I'll check out the audiobooks. I hope they're as good as Rob Inglis' reading of The Lord of the Rings. It may not count as "deep, heady, high literature," but he does an incredible job.
It's not for everyone but if you enjoy figuring out all the lies and misdirections and mistakes the narrator makes, it's quite an experience.