I got one from a technology testing program I do, I'll tell you my opinion.
How does the iPad Pro feel with 1 hand? You can't hold it with one hand, let alone 2.
and 2...?
in general...? Great for just propping up and typing, but not holding.
Would you recommend and why? I wouldn't recommend it, it's just an extremely over priced iPad, a Surface Pro is more bang for your buck.
Did you buy yours with WiFi+Data? Yes both.
Where did you buy yours at...? I didn't, got mine shipped to me.
Is it difficult to type a long paragraph, as it's "OK" in the iPad Air 2...? It's pretty good, nothing amazing though.
Do you see a big difference from your previous iDevice? Nope, still has the same look and feel of an iDevice, just freaking huge.
What are some of the differences? It's on steroids compared to other iPads, 4gb ram good CPU. Big screen, amazing resolution >1440p.