I've been using one of these cartridges for a few months now and I'm obviously worried that it won't work as well and/or last as long as the OEM cartridge, but thought I'd give it a try because of the price . Well I stopped worrying and now I will order these cartridges. Why pay exorbitant prices for the same thing when it prints just as well and lasts just as long. A note though. The ink is dark black and I have to use the toner save option to print everything or the printout is too dark. I can live with it.