OpenCR1.0

This controller is perfect for small robots in terms of the features offered:
Native servo ports
power connectors
High amp supply for 5v boards
Built-in, high quality IMU
Fast processing speeds

Negatives:
High cost for what it includes
USB connector is weak and tends to break off

The openCR board is a great single board package for XM servo control that combines several convienient features in a single board: IMU, power adaptation and servo control. The device is reliable and easy to use. The addition of a microphone aids in debugging. I would give it a 5 star review but the price and delicate usb connector are less than ideal. Overall though, this is a solid product for people looking to control a XM servo.

Pros:
+ Great controller option for the new line of X-dynamixels (though the options are limited)
+ Convenient powering options (I like the on board T-connector)
+ A great integrated IMU (one of the better ones I have used)
+ Built in sound is suprisingly useful for debugging and boot sequence notifications

Cons:
- Needing to hit buttons to put in programming mode is inconvenient and made worse by being hard to hit on the board.
- Clock timers are prone to memory crashes issues
- Upload time is very long for even simple sketches
- Very very expensive board