I ordered a bundle of the four cartridges required for my printer. Ordering was simple, the price was very reasonable when compared with the branded cartridges and delivery was so quick. Therefore I have to say that the service from Cartridge World is excellent. However, I cannot yet say how I have found the cartridges themselves because I always keep spare cartridges to avoid my being without. The problem therefore is that these are toner cartridges and not ink cartridges, which means they last a long time, depending on use. As I have never used this brand before, I cannot honestly comment. BUT I have no reason to think they will be any less effective than the last ones ordered (not from Cartridge World) and it is therefore very likely that I will be re-ordering when necessary, at which time I most definitely will be reporting my experience. In the meantime, thank you Cartridge World for the brilliant service so far!