Well 10,800 miles on my CX-5 and so far zero problems. I've gotten more used to it over time, and for the most part and quite satisfied with it. I still wouldn't mind going back to something smaller and less expensive and better on gas, but it's not driving me crazy or anything. I actually just got my 2nd oil change yesterday, I had the dealer do it because I'm sick and didn't feel like crawling underneath the car on the cold ground. I watched them do it and I did have them take a sample for a UOA and I have the filter. But when I was talking to the service manager he said that they haven't had any come back for anything except oil changes and tire rotations, no problems of any kind.
This has been our experience as well with the new SkyActiv engines. We had one where the relay that controlled the starter went permanently on and nuked a wiring harness, but that was a very very early build model.
The new version of the Miller cycle in the SkyActiv is light years more reliable than the old Miller cycle engine.