The Clifton line from Hoka has always been one step away from a great shoe for me.
The first iteration was a revolutionary shoe, combining heavy cushion with lightness. Unfortunately, the thin tongue killed it as a wearable shoe although most other reviewers loved that feature and the model overall.
The second version mucked up nearly everything good in an attempt to remedy the tongue issue. Unfortunately, the changes to the rest of the upper and the midsole were counterproductive in my experience; I found it to be a hot and overly firm ride.
The third version got the closest in my book to a big winner, but the upper really couldn't stand up to the beating I delivered during DC summers. http://www.midpackgear.com/2016/08/170-mile-revisit-of-clifton-3-not-so_18.html
So is the fourth time a charm? Through the first 40+ miles, I'd say yes.