The cost of branded ink at local cash registers was 5-6 times higher than these cartridges. Some of the reviews pointed out error messages etc. I was a little hesitant, but I put it on my HP C4280, followed the usual prompts for a new cartridge, and started printing with no problems. I believe the printer gave me a message during the install that the cartridges were empty, but I just clicked 'OK' to continue and had no problems. For the price it's definitely worth a try and hopefully your experience is as good as mine.