This is a decent sander for the price, but it has some design issues. The setup of the sander was quick and not that painful compared to other Grizzly products. It took a few minutes to adjust the tracking of the belt under not load. When actually sanding the first time, the belt tracking adjustment knob started rotating on its own causing the belt to walk off the rollers. This continued to happen repeatedly. Grizzly product support admitted that this is a common issue with this series combo sander. I was advised to add a wavy washer or external tooth lock washer under the head of the adjustment knob to prevent it form rotating during operation. After discarding the rubber washer under the adjustment knob and installing a wavy washer purchased from the local big box hardware store, the belt tracked perfectly. The back stop plate is held in place by one bolt and was not square to the belt when installed. A little bending using a vise corrected this. Overall, this sander has performed great once the issues were corrected.