Returned the 12.9″, switched to the 11″. So much better.
Upgraded last week from iPad Air (2013) after the home button wore out. Figured I would go big or go home. 12.9, 1TB. Spent a few days with it but I just could not get used to the weight and size. It went from a handy device, grab and go, look something up, read something device into a laptop.
So, a little less than a week later, returned it for the 11″. I also dropped the keyboard for the nice OtterBox symmetry 360, which protects the corners and still acts like the old school smart case.
Remember that as long as you don’t mess it up, Apple store will take it back within 14 says. Don’t keep something that doesn’t work for you. If it feels wrong, it is wrong.