I have a Canon Color Image Class MF741CDw. These cartridges are exactly what the doctor ordered. They arrived quickly, well packaged and with simple instructions. Setup was easy and took less than 10 minutes at Canon. As expected, I got the obligatory factory bluff message. I followed the instructions that came with it and the message went away. After the installation, I ran the printer test page. The colors were vibrant. I haven't had any problems and am keeping my order information because I'm sure I'll order again when the time is right. I highly recommend this product.