Yep, these models are all trash. They happily invent wrong detail. If you never knew anyone in the photograph, then knock yourself out, let it invent faces that didn't exist. But if you're doing anything with family photographs just stop. Unless you can tune a model on your own family photographs you can't magically add "correct" detail to a blurred, pixelated, grainy or unfocused photo. You can add colour, pretty reliably though.