Already have x-different refill cartridges tested for the office, and so far no other has brought this site power. I note and values of all. The average is about 1000-1500 pages. This brought 3708 pages. This is the best site performance by far. Otherwise everything as an original cartridge, replace and running. Quality from the first print to the last super, what others could not, unfortunately, always the case. My search for Allternativen the original is finished for now.