I purchased two toner cartridges from Cartridge Shop in error, as I thought that I was buying them from a different company with a similar name (Old age can be a real bugger sometimes). The last time I purchased toner cartridges from Cartridge Shop they didn't last very long. My printer display gave all the indications that the cartridges were 100% full when new, however, the toner level indications soon began to drop at an alarming rate, even when I was not printing colour images. The ordering experience and delivery service is excellent (hence the two stars), however, the products supplied last time were disappointing. I only hope my latest purchases last much longer this time.