I got mine a few weeks ago, and am playing with it, as it requires a new skill set. I shoot mainly in manual, so not too hard. It will require a few test shots to nail exposure, or perhaps a light meter. For me, focus is a bit tricky. I use a loupe to help. Also, I "discoverdd" yesterday that the dof button works with the lens, so this helps.
I ordered this lens today, can't wait to get out and try it!