This is going to be one of my favorite Zelda games. I've loved Zelda since the original, but this one is just loads of fun. The biggest drawback is that it is best with 4 people, and I really wouldn't want to play it with less. But if you manage to get 4 players and the requisite GBAs, I think it is a much better game than Crystal Chronicles.
Don't get me wrong, Crystal Chronicles is an excellent game, and scales down to 2 or 3 players better than Zelda does. But Four Swords really makes you work together on puzzles, while letting you run around trying to snag the extra jewels. It's everything I'd ever wanted to add to Zelda, playing Zelda with friends.