[This review was collected as part of a promotion.] Always better to use OEM ink, but, waiting to use up current ink. Recycled ink is great, but. OEM is safer, and on future plotter image you don't want messed up.
I have used HP since 1979. I like the calculators, printers and large format printers and computers. The ink refill cartridges must be profitable for HP, as they seem expensive. Still, all in all these are a good product.