The print quality is fine, but the printer complains that the toner is empty or no toner cartridge would be installed. Occasionally, the lid must be opened from the printer or the cartridge be removed shortly.
Although not a complete failure purchase, since he prints (see if he rankommt the promised 2,200 pages times), but no clear recommendation on C321dn.
Addendum: Meanwhile, the printer reports more often that no cartridge was installed, and can not also by removing the cartridge and re-use to persuade for printing. Just annoying.