It sure is kinda easy, boss and monsters are really easy to defeat. i hope the length of the game is here though.
I'm not really far in the game (just beat the first boss and got the Phantom Hourglass), but from what I saw you'll have to go back to explore everything (some doors closed in a dungeon for the moment). You also have cracked walls all over the world, but no bag to put bombs in for the moment. Thanks to the mini-map, you can write the place where you gotta try later anyway.
The world seems to be quite large, with random stuff on the map like sales ship, random enemies and so on.
The gameplay is really great. I was afraid when heard that it's 90% "stylus only", but it really reacts well. Except for the roll thing, which is really crappy and not so useful.. The boomerang is hell of useful too, to stun enemies and get rupies and hearts back. With 5 minutes of training, it becomes instinctive to run, walk, throw rocks and jump over holes.
If you liked the "Wind Waker" style like me, it's a real pleasure to see it on DS. The "Minish Cap" was great too, but far too cartoonish to really look like "Wind Waker". The 3D is great and smooth, explosions are detailed and cartoon-like. Kinda make me think the DS is able to get some good 3D games finally, after my terrible experience with the crappy "Viewtiful Joe".
A really good "Zelda" for the moment as far as I got, I really got sprinkles in my eyes for the moment. Cheers !