Three words: Impressive, though disappointing. He doesn’t look like a goblin, and certainly not like the one in the comics. Though, most of the changes in Goblin’s costume where for the better, I’d say. They improved his glider 由 far, his suit(though it doesn’t look goblin-ish) looks awesome, and his 南瓜 bombs would have made people die of laughter if it where actual pumpkins in the movie.
The Green Goblin is being played 由 a great actor(one of the best, in my opinion). Willem Dafoe has played in a lot of movies, but was on his best in Spider-Man. It was too bad he had to wear that mask, though. He also played a lot of ‘insane’ roles before(Speed 2: Crouse Control). Willem’s voice also suites the Green Goblin perfectly.
On a scale of 1/10 of how I liked the Green Goblin in the movie: 8/10. His glider is awesome, they improved his costume (partly), and is played 由 a great actor.