> Users telling me what works well and what could be improved can be very helpful.

That's a unicorn.

If I'm lucky, I get a "It doesn't work." After several back-and-forths, I might get "It isn't displaying the image."

I am still in the middle of one of these, right now. Since the user is in Australia, and we're using email, it is a slow process. There's something weird with his phone. That doesn't mean that I can't/won't fix it (I want to, even if it isn't my fault. I can usually do a workaround). It's just really, really difficult to get that kind of information from a nontechnical user, who is a bit "scattered," anyway.