I used to buy 3rd party replacement ink but I was having problems with the ink. It is a much poorer quality so sure. HP ink is not cheap but for me I decided to spend the additional money and get genuine ink replacements. Buying them at staples has helped me to save money as I use coupons that they often send out and run specials - almost every week. I also get rewards points which is an added incentive. Purchasing the combination package also saves you money and the high yield is obviously cost effective. I have never had a problem with the genuine replacement ink and they work great. In my view using 3rd party replacements is taking a chance as sometimes they worked well and often times they caused me problems.
We have been in business for about 4 years and this ink has lasted longer and printed more pages than any other that we have tried. It's always on sale so price is great.
The HP 950XL/951 High Yield Black and Standard C/M/Y Color Ink Cartidges produce very vibrant crisp color and seem to last a little longer than other ink cartridges I've used. The multi-pack is a very good deal for the money.
The quality of copies is great. I have been using this specific cartridge for over 3 years and never had a bad one. I like the XL because I get more copies. . . . . of course I always want more copies when it runs out.