If you're willing to buy new printers every year, then please go ahead and buy these knock-off cartridges. They claim their cartridges are compatible with HP and they ARE NOT. You'll know this once your printer dies from using these cartridges and that will be pretty much after their one year warranty. HP sends firmware updates to your printer and basically locks-out all the knock-off cartridges. Comp&Save WILL NOT stand by its products and will care even less about your ruined printer/s. Very bad quality and even worse customer service. Would not recommend to anyone. Buy the genuine cartridges to save your printer and your time AND to avoid the hassle of contacting Comp&Save. read more