I seem to have different feelings about this each time I read it.
Last time I was quite disparaging about it - I read it directly after Philip Pullman and, well, the two just don't compare.
But this time around, I enjoyed it. Self-consistent it isn't, really, but I found it nicely self-aware and sharp (I particularly enjoyed Jim McGuffin, the weather reporter who alerts us to Strange Happenings on the eve of Voldemort's defeat at the beginning of the book), and a generally pacy and well-set-up read, its several plotlines tightly woven without any of them feeling cheap or underserved.
Also, obviously, nostalgia.
I must have been feeling particularly grumpy in 2014.