I have been using HP printers and cartridges for 8 years and have had no problems with them. I had software compatibility issues with some Xerox printers. HP cartridges in particular did not cause any problems. I didn't count the actual pages in the cartridge but based on what I'm printing (payslips/reports/accounting) I'd say you can expect the result to be as advertised. I have found the X cartridge to be more economical than the non-X cartridge.
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