This 126 toner cartridge works as expected in my Canon LBP6230dw. Test pages of text, lines, and shading at 600 and 1200 dpi have good, solid coverage and blend well with the paper. (Do not judge the test pages by this uploaded photo.) There is no "Use By" date on the box. Shipping parts that must be removed prior to installation are highlighted in bright orange. Packed Safely in a Box in a Sealed Plastic Bag. The useful life has not yet been determined. I recommend this product.