I find the style vomit-inducing. Too lush yet plasticky. Doesn't make for much clarity in the gameplay, and it gives a fake atmosphere. It's like Trine but worse. It's like Tim Burton gone wrong.
Also, I like Chris Hülsbeck and Machinae Supremacy, but I don't think that what we've heard so far fits the gameplay at all. I know they're remixes of actual Giana Sisters tunes, but they don't fit all the same. I like to rant about Nintendo's lack of ambition with NSMB's style and environment variety (or lack thereof), but when the alternative is this, I'd rather stick to NSMB, no question.