I found a couple of hands on impressions that I thought I would post.
Kotaku was very positive, here is a excert from the article.
FlingSmash's core concept is loads of fun. It's got pick-up-and-play appeal that sucks you in with seemingly simple gameplay that eventually reveals itself to be quite strategic. The WiiMotion Plus support also goes a long way towards adding layers of depth to the game. It's not something you immediately feel, but after a few levels you learn that swinging the remote like a drunken monkey just won't cut it. The technology also pulls off some amazing physics and gravity-based tricks, like adding tangible weight to the portions where Zip is morphed into metal.
Hopefully those will be helpful to people still not sure what the game is about.
