Late to the game so maybe you got your questions figured out, but we have one of these in place as of this past summer in a 24/7 environment.
Problem 1: Can't disable copy mode, but that's an issue with HP and their settings.
Problem 2: It jams a lot more often than it should, again an HP issue.
As far as Mac and Win print packages, it's no different than anything else we run. EVERY printer we deploy is done so with the PS drivers cross platform client to server so it's all consistent. Other than that, curious what you may have issues with or what you've learned