Ordered 4 black cartridges. I'm a student and I type a lot. I wanted to stock up so as not to run away at the crucial moment. But I was surprised when my current store bought cartridge lasted another 6 months. So when I first tried to install my first Greenbox cassette it was 6 months after I bought it. There is one more step to installing them that I don't have to do with the cartridges I buy at the store. On the printer itself, I had to run two command prompts. Well, in short, I didn't get it. I messed up and ended up damaging the cartridge. At first I thought that not all cartridges would work for my printer. I was very concerned that Greenbox would not help me as it had been 6 months since the purchase. I emailed them and received a very quick response with instructions on how to proceed. After these instructions I realized what mistake I made trying to install and how the cartridge actually got corrupted. That's when I realized that the other 3 cartridges were working fine. I emailed back and Greenbox immediately sent a new cartridge to replace the damaged one! 6 months have passed since the purchase! The cartridge works great. The only thing I can't verify is how much each cartridge can print as I haven't used them enough yet. But I was delighted with Greenbox's customer service and the fact that they took care of me when I damaged a cartridge. I will definitely buy from them again. I'm so glad I found a quick and easy way to get ink at a much better price than the store.
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