The service from "InkTonerStore" was fabulous. Well packed and quickly shipped. Complete instructions are included. As for the toner itself, it does not produce as bright or prominent a print result as the original manufacturer ink. However for my purposes it is acceptable and an ENORMOUS price savings which is vital for my business. I'm creating invoices and instruction sheets. When I can spend a little over a hundred dollars for 4 toner cartridges instead of over four hundred it has a huge impact on my bottom line. I recommend "InkTonerStore" to one and all. Thank you.