Pretty good, or, in the words of one moviegoer, "Less terrible than I thought it'd be!"
We actually enjoyed it.
Yes, yes, it suffers from Zack Snyder, who wouldn't know nuance, subtlety, or deftness if they kicked him in the teeth, so most every scene is a cacophony of noise and FX, but the gorgeous cast and funny quips get the monstrosity across the finish line and leave a few grins in its wake.