Over the weekend, the Circle Pad Pro was released in Japan, meaning that people across the country are playing the 3DS with dual thumb circles.
Japanese website Game Watch Impress took some of the best hands-on photos I've seen of the device that should clue you regarding what it's like to hold the device as well as how it looks.
One thing that doesn't come across is how light the thing is: It's basically a battery, some screws, and air.
Read Kotaku's hands-on impressions here.
The add-on is expected for release in North America in early 2012.
3DS「拡張スライドパッド」 [Game Watch Impress]