This paper shredder is really very effective. It is capable of destroying CDs, credit cards and even staples! The shredded paper is not usable, it is not a "chopper" low end. Everything is supplied with an oil can for maintenance and some bags (which are also not necessarily required). The device is assembled very easily, and it has wheels for moving it gently. The sleep is done after 2 minutes break, which is pretty good. A security system detects whether the hands touch the slot and stops the grinding when appropriate. Perfect to avoid accidents. Very good product.