Gamertell has posted a review of Sega's Super Monkey Ball 3D for 3DS.
From the review:
"The more I play Super Monkey Ball 3D, the less it impresses me. The main Monkey Ball mode is the best the compilation has to offer, but unfortunately the 70 levels can easily be cleared in one sitting. Two, if you really want to stretch it out. The game looks beautiful, bright and colorful, but it just doesn’t hold up. It’s all style, with little substance. Granted, Super Monkey Ball 3D does nicely round out the 3DS launch lineup, but I doubt it will be anyone’s first choice."