I've just begun using this great software and as D-Nice has said in the past, once you go ISFccc mode, you'll never go back to Pure mode.
Pure almost looks drab by comparison and it reminds me of what plasma fans have so often heard from some on this forum...plasmas have dirty whites. Although I don't agree, anyone that feels that way should take a look at ControlCal and what the ISFccc mode has to offer. If you want brighter whites than this, you better grab your sunglasses.
At the same settings as Pure mode, the ISFccc mode is significantly 'punchier', yet I can see no crushing of whites or blacks when using it...at least visually.
But I think you really need to be careful using this mode if you don't have sufficient hours on your panel. The fact that the panel is driven harder makes the issue of break-in that much more important.
As I said, I just began using ControlCal and am only just beginning to explore it's features. A big thanks to Turbe for some lame issues I had at the beginning. It's amazing how much you learn if you actually READ the instructions!
BTW, I am using a USB>Serial adapter.