I ordered 16 cartridges (7 black and 3 of each color) for less than a set of four Epson brand cartridges. I figured for the price, I could throw half of them away and still come out ahead. The first one I put in was no good. The printer said it was empty. I tried reinstalling it several times before giving up and opening a second one. I put it in and it worked but the printer said it was only half full. I put in a yellow one and it reads full and is working fine. If this rate keeps up, I'll probably still come out ahead price wise. We'll have to wait and see how the rest work.