I've mentioned before how much I love the Dark Tower series. And while I keep asking myself why I waited so long to read it, I'm also glad I waited because I can go to the next book immediately. I was so wrapped up in the story, that I was surprised it ended. I bought the next audible book immediately and I'm already a couple chapters in. I cannot put these books down (I guess turn them off is more accurate). And that's a good thing because each book can be anywhere from 12 to 26 hours. This one was 26 hours and 20 minutes. But, I can't really find fault with the length or the storyline - I loved every minute of it!! (even the sad parts)
If you are a Stephen King fan, and for some reason haven't read this series yet, start now - you won't regret it. Especially if you liked The Stand or The Talisman. :)
Btw, I now know why the narrator changed from Frank Muller back to George Guidall. Frank Muller was in a motorcycle accident not too long before the book was ready to be recorded. Stephen King talks about it in the afterword.
If you are interested in more details USA today article