This is a wonderful sander. Lightweight but good for heavy use. Hook and loop sanding parts are really easy to use. The switch is placed very conveniently. When you place the sanding pad please make sure all the wholes are aligned with the holes in the sander and give a good pressure all around and sand on the flat surface by applying some pressure. Once it's settled the sanding pad stays pretty good. Then you can sand on the uneven surfaces. If you don't follow the procedure I mentioned above, most of the times the sanding paper would fray from the sander. It is one of the most reliable tools I have ever owned. I have helped friend build three living units with this sander. Do not buy cheap Black and Decker orbital sanders.