This all-in-one has serious advantages: it included printing on CD / DVD and a scanner accuracy of 4800 dpi! It also inherits the expertise of Canon's print quality: special black cartridge for photo printing, etc.. The unit manages the print on both sides, and offers speeds very satisfactory: 9.2 ipm in monochrome and 8.1 ipm in color. Finally, the MP640 can scan a document directly to a USB key or memory card and that's quite convenient.