In a word.....terrible. Batman is useless and more of a comedy add in, rather than a superhero. Aquaman is hardly seen using any powers; other than being strong.
The film seems to try and rip off some of the MCU. They even have their own Ironman, who is seen at the end with some circular item in the centre of his chest.
In the end, after the most underwhelming way of beating the bad guys...superman and the flash have a pointless race in the end credits. 2 hours of my life I'll never get back.