Great sander, ample power, belt changes and tracking adjustments are a snap.  However, one time during use, I inadvertently let the power cord get too close to the drive wheel.  The tool sucked the cord up, wedging the cord between the sanding belt and the tool housing, and grinding the motor to a halt.  The cord was easily repaired, but the drive belt (which connects the motor to the drive wheel) was shot and needed to be replaced.  The moral of the story is to keep a close eye on the cord, and keep it away from the drive wheel at all times.  Other than that, the tool has performed flawlessly.