Nearly done with my first turn of the Dark Tower. (Spoilers)

I don't want to throw up a ton of spoiler tags so I'll say that I was still into the series right up until the conclusion of the the battle of Thunderclap ; that was the point the series finally started going off the rails for me and never fully recovered.

Ironically, the only part after that that I genuinely liked was the ending ending, aka the ending that's supposed to be so bad that King breaks character to tell you not to read it. If for no other reason than it gives Roland, his ka-tet, and myself hope that one day they'll all get a conclusion to the saga that isn't shit .