I'm going through the Dark Tower series for maybe the 5th time (on The Wastelands currently). I consitently run into people who've read the series that are (as predicted by Stephen King) massively disappointed with the ending; however, with as many read-throughs as I've given these books, there really could be no better way to close-out the final issue.
Having given all of these books away in the states, and the exorbitant cost of just about everything in Oz, I'm forced to constantly revisit second-hand stores, like some literary Flying Dutchman, doomed to hope that some poor nerd has passed away, bearing his family with the grim task of donating his dogeared and yellowing Stephen King collection. that said, I've yet to see The Wolves of the Calla, and reckon that I'll be forced to buy a "new" copy soon, shortly after The Wind Through the Keyhole.