This game brings happiness.
The graphics are nice, especially for a DS game. Each part of the castle looks great, and there isn't much you could wish they would improve on, unless all you care about in a game is graphics.
The sound is one of my favorite parts. Each section of the castle has a catchy tune that always gets stuck in my head.
There are three endings in the game, only one of them good. Once you beat the game, there is other modes and things you can try. I think it's easy to spend at least 40 hours into this game until it gets boring.
I enjoyed this game alot, with 100+ different enemies, great boss battles that are tricky, and tons of weapons, potions, and soul powers, it's hard not to enjoy it. Expect a lot of backtracking, though.