The cost of replacing toner cartridges is exhorbitant. The materials involved manufacturing the toner cartridges do not justify the high replacement cost. We participate in the recycling program. Why can't we purchase recycled cartridges, or at least get a credit to apply to replacements? This lowers my opinion of the HP brand.
Toner is easy to install. The print quality is good. Lots of warnings once it gets close to being exhausted. Sometimes it causes the printer to hang if you do not acknowledge the warning notification.