When I purchased a Canon printer for my office, the shopkeeper told me that I should always use the products of Canon . Actually , I purchased the printer from the cannons official shop. I also got a vanity of 2 years with the printer. But it was written on the document that if they use any other product which is produced by any other company, then the guarantee will not work. However , I used the fuji xerox toner cartridges for the 2 years. And when the guarantee period is over, I started to use the Chinese ink refill cartridges.