Reviewers Liked

  • Comfortable, even under heavy use
  • Extremely forgiving for beginners
  • Storage built into the battery compartment for the Unifying dongle
  • On/off switch to conserve battery power

Reviewers Didn't Like

  • No corded option
  • Learning curve can be daunting for first time trackball users
  • Click wheel is loud
  • Designed for righthanded users