This film has tested over eight times, so I imagine it’s either not good, or Warner Bros is really reworking it for the perfect version. Or maybe the truth lies somewhere in the middle.
You want the truth? Reactions so far have been mixed — not disastrous, but not glowing either. Milly Alcock’s performance as Kara/Supergirl keeps being singled out as a major highlight. On the other hand, several sources mention that the action sequences don’t quite land — director Craig Gillespie doesn’t seem to have a full grasp on them — and that the main villain, Krem, feels underwhelming. Reports, from multiple screenings, do indicate Jason Momoa’s Lobo making a strong impression, despite the limited screentime.
Tldr?