How good is Pitch Flex on the Evantide H9?

[Dingleberries]

I'm just waiting on an expression pedal & am hoping it's better than a Whammy pedal.

 

[NaturalBornBoy]

You do have 5 mins to try out the algorithm before buying.

 

[Dingleberries]

I know, but I wanna know what it's like with an expression pedal, I'm hoping it tracks well.