Previously, I used NVPrint products, their cartridges proved to be excellent on HP P1015. Good workmanship. Due to the small number of prints, I contacted the manufacturer, they answered that it looked like a marriage (toner shortage), requested a photo and a screen from the printer's admin panel (consumables status). Let's wait for the reaction, and then I will add a review. : Phoned the manufacturer, described the situation. Sent pictures to the email address provided. In response, they sent a courier delivery, a new cartridge for free! Bravo NVPrint! Really great customer service!