I bought a 12A Toner cartridge for our canon LBP2900b printer which we bought from flip kart. We have about seven canon printers in our office. This toner we have purchased is yielding pages after pages. I think i may have printed about 2000+ pages, most of them printing of scanned images. The toner still delivers.
The Fullmark cartridge work just like HP & Canon cartridges or even better at a lower cost!
Going forward, We buy our cartridges from Flip kart.