The HP Smart App forces you to agree to use only their ink before you can use their app. That shouldn't be a big deal since modern HP printers work fine out of the box without a driver.
However, after you've printed a bunch of pages, they stop working and display the error message "Printer setup incomplete. Your HP+ printer must be set up using the HP Smart app. Visit 123.hp.com to download the app and complete the guided setup. Any pages you have printed were intended for setup and have been exhausted."
Conveniently, this usually doesn't happen until it's too late to return the printer.
Some time later when I finally used the ink I bought, imagine my surprise when the printer wouldn’t accept the ink because it was from the “wrong region”. HP printer ink is region locked!
I called HP support and they fed me an unbelievable story that this was for my own good. You see, ink in different regions is turned for the climate in that region, the support rep explained! I was dumbfounded at such a stupid explanation.
With no other option and wanting to prevent others from making a similar mistake, I tweeted about my experience. Magically, HP support promptly contacted me and sent me replacements. So now I’ve learned that not only is HP unscrupulous and manipulative, you are wasting your time bothering with normal support channels. You’ll only get results if you embarrass them publicly.
I’ve purchased my last HP printer, but I fear each of their competitors is just as bad.