My ML2850 toner cartridge arrived safely. I have only just got round to trying it out. When I did try it I thought that I was going to have to return it as at first I could not get it to print. When I tried to print something a sheet of paper would start coming out of the printer but it would jam with about one third still in the printer. Nothing was printed on the paper. I eventually traced the problem to the 4 contacts that the supplied cartridge has that my original does not have -- see the attachment where you can see that my cartridge has no contacts and yours has four. One has to be a bit forceful in inserting your cartridge to make sure that good contacts are made. My original cartridge goes in very easily. It would be helpful if advice regarding making sure that the cartridge is firmly inserted were included with the cartridge.

Purchased a few of these printer for the office mainly to print out invoices, as they were so cheap to buy we did not expect such a great print quality however soon realised the toner cartridges that came with the printers were starter cartridges that only lasted approx 500 pages. As we looked to replace them we had made the decision to go for the hi-yield toner cartridges but the manufactures ones were going to bankrupt us as they were over £300 for a full set. Then we goggled upon these and having tried them can say they work exactly the same as the Minolta starter cartridges did. We are back in business printing out loads of invoices and the quality of print is the same, glad we found this site, we now have it bookmarked under favorites.