Hello, this is my first forum post! I'm in the process of building my first robot, and I'm not sure which motor shield to use. It will be a two wheeled autonomous robot that uses an Arduino Uno. I am using 2 1:120 geared motors. The robot will be similiar to the Bliss Robot (http://letsmakerobots.com/node/28477), just with a different ultrasonic sensor. I now of the Instant Robot Shield made by PICAXE, but I'm not sure if this is the best option for my robot.