I was advised to get the extra amount ink cartridge. It was easy to install and exactly what I needed for my new printer. Now if it was even double the ink amount I would feel it was priced well for everyone.
We purchased the HP 64X/64 Black High Yield/Tri-Color Standard Yield Ink Cartridges just as our current ones were running out of ink. Since they were the exact replacement they worked perfectly as expected.