These are great cartridges. I have a 8600 printer in my home and I have a 8100 and a 8610 model at my place of employment. The 950 and 951 cartridges works on all three so I don't have to buy different types of ink cartridges. I print out a lot of color copies for my students (I'm a teacher) and I find these printers to be really cost effective. If you don't print out a lot of things then it will take you a while to run out of ink. I always opt for the maximum for the black cartridge and the minimum for the color ink.
These ink cartridges are great with my HP printer. I work from home and do alot of printing and these cartridges will last for months without needing to be replaced. Good job HP!!
We use a lot of ink and this is the better deal in the long run. You get more copies and a good quality print job from copy # 1 to Copy 2000 ink is consistant.
This ink while expensive gets the job done. Our only issue is that it seems to go really fast however it is important to take into account how much we print. We are a dental office and this ink is our favorite so far!