Cool gameplay, it's very Harley Quinn-ney. But it's way too short.
There's something satisfying about the maniac laughing in the background while in her Psychosis mode. It's like being inside her head and all the madness.

It's also cool that you can see certain hidden messages on the wall only in this mode. At the end of the day, Harley is just a poor girl with a personality disorder and daddy issues.