I enjoyed the detective side they showed with Batman. It was definitely a different feel, but Pattinson was fine for me as the lead.
It was a l bit long, maybe too long? Hard to say.
There were a few very memorable scenes, so I would say not a flop but not a monumental film either. I felt it was worth the time to see it.
( after seeing DR Strange I actually liked the batman more than I did initially)