Overall a great sander. I have dropped,stepped on and kicked this tool(not on purpose but I have very small shop)and it keeps on going. The case has stayed in great shape and I use the sticky backed sandpaper and the pad has not come apart. I would give it 5 stars but the on/off button is hard to work. It is sealed in a rubber cover and when you turn it off sometimes it comes back on because the cover causes you to think you fully depressed the switch when in fact you only pushed part of the way.