I think I've only used one or two of these Greensky cartridges so far but they work well. I've been buying these 5 packs from various sellers on Revain for a number of years. I think this is the first time I've tried Greensky. With the other cartridges I've bought (various brands), I expected at least one of the cartridges in each pack to have problems (toner spatter on the paper, streaks or lines, etc.). I only expect to have to throw out one of the five toners in the box. While annoying, it's a lot cheaper to buy them this way (compared to buying from HP), which is why I keep doing it. I have never had any damage to my printer. I hope Greensky is doing better, but I wouldn't be surprised if he does poorly. If not I will continue to buy this brand. Even if the bounce rate ends up being 20%, like I've experienced with other brands, I'll probably keep buying them (or whatever brand seems to have the best deal). I know I can return damaged cartridges but I usually use them for a few months after buying them and I don't think it's worth the hassle of finding out which brand is defective and sending them back. I reckon if 80% is working well I'll still buy them for around $16-$20 per cartridge - way less than I would have to pay for HP toner.
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