I'm four worlds in and I've got some mixed feelings.
It's fun, and there's new gameplay quirks added in every world. It has a presentation (island setting, the way the levels are setup) that reminds me of Yoshi's Island, which makes sense (Artoon made YI DS), but is still weird.
The controls are absolute ****. As far as I can tell, you have to keep the Remote fixed on the middle of the sensor bar as your neutral position to get anything to work correctly. Of course, as everything heats up, finding that neutral position is tough, and you have to fight the controls to control your character.
I like it, but those damn controls...