Bests & Worsts Reviews from Amazon

The HP 564 Original Black is really inexpensive to buy. In addition, they do a fairly decent job of printing. However, I seem to be replacing these cartridges way, way too often. I am experiencing roughly 50-75 prints before the printer tells me it's time to replace the cartridge. HP advertizes up to 250 yield. I'm getting nowhere near that claim. Overall, this product is horrible. And, I refuse to purchase the more expensive "XL" version (3-4 times the cost of the non-"XL" version), even though HP claims they last 3-4 times longer than the original. HP advertizes up to 800 yield on these "XL" versions. I don't believe their first claim of 250 yield, so what makes you think I will believe their second claim.