I've refilled my laser printer cartridges for years now and not found anything wrong with the refill toner.
I did receive some once that was actually re-labelled Xerox toner which shows that, at least, had a good pedigree.
OnePlus 5 review
Alice Saey's mesmerising animation for Dutch singer Mark Lotterman
iPad Pro 10.5in (2017) review
Comment booster votre iPhone ?