Review on Z Ink Replacement Brother TN450 by Nick Shirodkar

I replaced my Brother toner cartridge with one of these EZ Ink toner cartridges on April 1st. The declared volume is 2600 pages with 5% coverage. Two days ago, 3 weeks and 1 day after installation I started getting the toner low error message. I printed out my printer settings pages to document the longevity of this brand. 348 pages and all I have left is 40% of this toner cartridge according to the printer settings. That means I can get about 580 pages out of a cassette. Nothing like what was advertised. That's a terrible value. Adding to this criticism, the initially good print quality has steadily declined this week, with toner specks appearing at the edges. I do not recommend this product and I am disappointed that the return window is closed.