I will constantly live in awe of Lev Grossman's writing style. He has a way of effortlessly slipping from sophisticated, playful description with elaborate linguistic choices to 'I fucked your mom' jokes, dragon porn, and toilet humour. He makes so many honest comments about books and philosophy (and what I interpreted as a thinly veiled magic/writing metaphor on multiple occasions). I will never tire of his witty, engaging, and ever entertaining prose.
The Magician's Land was no exception to this, and in my opinion, it exceeded the standard of the previous two books. It brought together the various characters from throughout the series, and tied up the loose ends that had been left hanging from the previous books. Not to mention the fact that the character development here was astounding, especially with regards to Quentin and Janet.
Of course there were elements of this book that I found somewhat grating, but they're matters of personal preference rather than legitimate flaws to the book. For that reason, I won't mention them in the context of a review.
In my opinion, this is a beautiful work of fantasy fiction: humorous, honest, and absolutely spellbinding (pun intended!)