Good product for sanding large areas quickly: walls and ceilings. For ceilings it is hard for the arms, but the operation is quite fast, it compensates. I sand the old paint before a new layer with coarse grain (80-120) and tape to joints with slimmer (150-180 or 240). For against two negative points: - The connection to the vacuum cleaner work is not standard size, so I arranged the connection with coarse scotch - The black plastic mark the walls, so I put painter's tape around the grinding disc for working near the corners. For the price, I recommend!
