The cartridges are easy to install and perform very well. I do have two concerns. One is that I paid less for my first car than one of these cartridges costs. They are very expensive. Secondly, my HP printer now seems to be telling my computer that there is some problem with the printer. Installing the cartridge is so easy, I don't think I caused a problem. Could it be that there is a flaw in the cartridge that causes the error message?
It immediately returned a message: "incompatible black cartridge." The new toner cartridge is identical to the old one I removed. I replaced the old one and it is working.
Good quality and fair price. I would like it if the “pages remaining” estimation were more accurate. I typically can print at least 50 pages once the “toner low” dialog box starts appearing, and at least another 30 after the “toner very low” warning. Seems a bit Chicken Little-ish to me.