I gambled and bought this product (in spite of the negative reviews) just to save a few bucks. Looks like I picked the wrong product to gamble on. Just put one of the "new" color cartridges in my HP Deskjet 810C, but it only prints in magenta; both yellow and blue are MIA! Now I have to spend the extra money I saved and replaced this with a new cartridge. Some people have had no problems with this item, based upon the feedback, but it does now appear to be a crap-shoot. So, you have to ask yourself one question: "Do I feel lucky?" Well, do you punk......?