I've installed the toner in my ML 2010PR. Mechanically it fits properly. The image of the first test print is clean, evenly and without stripes. How much toner is in there, can, unfortunately, not as easy to determine, and with the occasional print (like us) could ever be years before the cartridge is empty.
Addendum: after half a year and about 300Seiten showing printouts many vertical stripes. At the printer, it is not because I have kept my previous cartridge as an emergency reserve and with this cartridge have printouts no stripes.
That is, after about 10% of the presumed range, the product is useless.