My wife drives a '16 EcoDiesel Grand Cherokee, and we absolutely love it. It's been nothing short of fantastic. It's what sold me on ditching my JKUR in favor of the JLUR.My buddy has this engine in the Ram and it's been an unmitigated disaster. One problem after another.
That said, I've read a dozen or so articles about some of the problems with the early EcoDiesels - they've certainly had issues. Maybe we just lucked out, but it's been rock-solid for us.