I admit to having tried cheap refills in the past from knock-off sources. Believe me, they are not a bargain in the long run if they gum up your printer. HP offers consistently good quality and you can depend on the cartridges delivering the page count advertised.
It's toner and it works just fine. Not too much to say. HP had a good price along with free 2-day shipping. I would order this product again if needed, but would also check the office supply stores for competitive pricing.
This larger cartridge lasts longer and is a better buy for that reason. We usually run our printer even after getting notices that the ink is low. We use it until it lightens up on the page. Excellent product!
I always recommend that users use preferred original product in their printers. It's just not worth the difference to purchase refilled cartridges. You don't get the good quality prints and it gums up your printer.