Fitzgerald writes so beautifully you find yourself re-reading sentences just because you've never seen anyone express an idea so perfectly. His writing talent in this book is astounding. If you like excellent writing, this a book for you.
Fitzgerald pulls us into the world of each of his characters and paints them incredibly. We may not like these characters, but we certainly know them. The world of rich long islanders in the 20s and their questionable activities comes to life.
A worthwhile read, even if your teacher says you have to. If you read it in school and didn't like it, give it another chance.