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The cartridges work as they should. But a) the price is disgraceful, b) the warning that the previous ones were running low (inducing you to change them) came on FIVE MONTHS before they actually ran out, and c) every time I have tried to access the HP recycling website, to obtain the return address label, I am shown an Error 400 message. So very unimpressed with the company.
Quality wise there's no question in my mind that original cartridges are better and safer than third party clones - but the price . . . . gouging. That's why overall I only give three stars, because my perception of value nowhere near satisfied. And as for the cash back incentive, my god that was complicated. Very quick delivery though - ordered on a Sunday, delivered the next day (Prime).
Looked to purchase this pack again , beware on Prime last year it was £40.00 cheaper , and individually £20.00 cheaper, so time HP to dump the printer. not good value now 2017 toners are so so expensive.