I had, having considered, first decided in existing reviews for the purchase of MS Points 20x cartridges. The reviews were favorable and the price even more. After the first exchange of the black cartridge I had after a full week a puddle (with adorable black paint) on my wooden floor. Part of it could wipe himself, the other remains for me now to get lasting memories. The subsequent cleaning of all cartridge bays 4 was a particularly impressive pleasure! Approximately 20 min with all sorts of "aids". Quite an exercise tolerance ... The next black cartridge from the assortment did not fit with the best intentions. They did not rest a, despite several attempts cautious with more or less lyrical pressure. But of course, just that nothing was done in the defective cartridge slot. The following cartridge finally fit like it should be. (So is any improper changes in the printer system before!) A complaint was me on the one hand to a nuisance because of undue burden. On the other hand, I have lost confidence, because one must expect a similar mess. - This product therefore I will buy again in no case.