More funnier than first book, for sure. New characters are introduced along with new locations and we know a little about the Spell that's stuck in Rincewind's head and its repercussions. Besides that, Pratchett makes fun of half a dozen fairy tale tropes which as always is hilarious when it involves the worst wizard in the Disc and the traveler. 
 Humor is more tongue in cheek with Death getting best lines and being sassy, the trees take the second place for being, well, naive. The wizards of Unseen University are unknowingly witty and the laughs come at their expense. 
 I like that the lead character is opposite of traditional lead; he is a wizard who cant do magic, is scared easily and finds himself in bind every five minutes or so. It makes him more appealing when he manages to barely make it out of sticky situation alive. 
 Truly, wonderful.