I only use HP Cartridges for my old HP8600 which has been running now for over 8 years without a hitch. I realize that there are cheaper cartridges out there but when you have to depend on your printer to get an order out on time, why would you gamble on anything but the best specifically made for your printer? It's a no brainier to me, but its' something to think about the next time you need a refile for your HP printer.
I am very happy with the Office Jet system and its pressurized cartridges. It is greatly superior to the Ink Jet system which tends to dry out when the printer is used infrequently.