Your service is great. I use to buy these cartridges out at Costco.I noticed that I was running out of ink so quick. I was spending so much money buying ink. I felt that the cartridges were not being filled all the way. So I decided to try to find another source. I looked on the internet and found you. I ordered your cartridge it was 25 mils just like the Costco one. I kept waiting for your cartridge to run out of ink. It lasted twice maybe three times longer. If I could prove it I would sue Costco or the supplier for cheating the consumer. I just don't have the proof. I can't tell you how much money I spend on their half filled cartridges. Anyway I am very pleased with your product and service and will continue to buy your products as needed.