It's a really fun game although I suppose it shows its age. Like others have noted, go with the Wii version because the DS edition changed a lot of shit and has worse controls.
That said, I like that the DS version has other characters, I just dislike that you're forced to play with them (the worst being Yoshi, who you have to use until you find Mario) instead of keeping them fully optional.
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There are precious few at ease / With moral ambiguities / So we act as though they don't exist.