Review on HP Cartridge CC640WN Deskjet Photosmart by John Arrow

We bought this cartridge in April and it was a disappointment. It ran out of ink very quickly, and as soon as we refilled it, it suddenly became "incompatible" with the HP printer. Official HP cartridge is now incompatible with HP printer, unbelievable. Did I mention this is the second black cartridge we've used with the exact same issue? These things are programmed to stop working after a while to force you to buy more. Don't waste your money like me, just buy a laser printer. This product is a useless money sink.