The M479fdw’s cartridge system is outstanding. Both the black and color toner cartridges allow you to print a large number of copies before they need to be replaced. Pop-ups will alert you when toner levels are low, and there are high yield cartridges available if you need to print more.
Although there are third party toners, changing them involves having to remove a microchip from the original cartridge and placing it on the replacement cartridge, so that the printer recognizes them as being genuine. Some people may not mind performing such tasks, but it may be an unreasonable amount of tinkering for the average user. Also, using third party toners can void the manufacturer’s warranty.