I've always had good experiences with HP printers too. My friend did an internship at HP this last summer, and apparently they do a huge amount of R&D to develop their ink. Only problem is the business model where the printers are subsidized by the ink sales, so people try to refill with third party ink which generally does not work so well. Not to mention the fact that there's got to be some residue left behind in an empty cartridge, even if you could refill with HP ink