I've sold mine as while there were things I loved using it for - eReader; digital notebook; YouTube - the combination of screen and iOS meant I just couldn't seem to make it comfortable for web browsing no matter what I did with the font sizing. I'm not sure how much of that is down to my eyesight and how much is due to things that could be improved if Apple focused on a Mini-specific version of iOS.
Its a brilliant device and I love the form factor, but having given it four week or so, its just not for me which is a shame.
Re the screen, its perfectly fine, but when going back to the device from newer Apple products, I did notice the older tech - less smooth scrolling in particular.