as per my standard movie rating scale:

I certainly can’t recommend anyone go out and spend money to see this on the big screen. I mean, it is VISUAL so if that means something to you… sure, I guess… but you’re probably better off using those dollars on Thor or Blade Runner if you want to see something pretty on the big screen in theaters now.

So really, the reason to see this is “I am very invested in the DCEU characters and I want to see THEM on the big screen.” Without that… not really.