I didn't read all the posts, but I also had the unresponsive 12.9 screen. I sold it right away and upgraded to the 2018 12.9. Love this machine and never had any problems with it.
Even when Apple releases a refurbished unit online, I am SOOO tempted to buy it for my daughter instead of the new 8th gen iPad. But then I come back to reality and remember how frustrated I was when it was unresponsive.
Even when Apple releases a refurbished unit online, I am SOOO tempted to buy it for my daughter instead of the new 8th gen iPad. But then I come back to reality and remember how frustrated I was when it was unresponsive.