I really like it.
It's a lot like Link to the Past. The dungeon layouts are similar. It's also similar to LttP graphically. But it has beautiful particle effects and other graphical coolness straight from the Wind Waker.
In a way it's comparable to FF: CC, although IMO Four Swords Adventure is a lot better. But then again I am a huge Zelda fan so I'm probably a little biased. I do think that FSA has a much better single-player experience, while FF: CC is best when played with at least 3 or 4 people.