It started dragging for me in Las Vegas, and I put it down forever. First time I've ever read a novel that felt like it was written in real time.
The Vegas stretch was what has me stanning! It reminded me of the hazy stupor of the second half of The Secret History. The friendship with Boris and his relationship with his dad was fascinating, particularly how she withholds details until it's time to go. I also stan To Paradise though so I think the lit nerd in me just falls for these wordy 700+ page tomes by design.
On the note of Babel, I did really adore it but ironically I felt like it could've used a slight trim in the final part. Please report back on your thoughts @Trinu 3.0!