Hi Irv, OK - first please note I'm not trying to scare any one from any thing. It's no skin off my nose who prints with whatever fluid they want to run through their printers. I only raised considerations about things to be mindful of. Up to readers to do their own research and make up their own minds. Now, on the questions you raised: speaking for my own ways of developing confidence - if I were to see test results published on Wilhelm-Imaging Research or Ardenburg confirming adequate longevity for these products on the papers I use, that would satisfy me on the longevity question. When it comes to performance (colour gamut etc), we assess that through the profiles we create. You create, or have created for you, printer profiles using your ink and paper combinations, and those profiles can be measured either in the profiling software itself or in applications such as ColorThink Pro. I would like to see comparisons of profile measurements for the same papers, comparing OEM with 3rd party inks, and done by respected professionals who know this business and technology well - you should know who I mean, but if you need examples, folks such Andrew Rodney, Scott Martin and their likes. As for other respected industry practitioners - well the multitudes of professional photographers selling high end photographic work and who would only use inksets and papers that have been properly tested as mentioned above. All I can do is recommend considerations to be aware of. Having done so, this ends my participation in the discussion of this matter.