A better colour integrity, especially for the luminosity.
A better control of the luminosity, notably the possibility of modifying contrast.
The possibility of making an automatic contrast (due to the Auto button) then of re-adjusting.
Four Out of Gamut Clipping methods (click here for explanations).

Example 1: Here, we made a simple rotation of the tint of 180 . Compare the two results below.

Example 2: Here we pressed the Auto button , then set the saturation to level 50.

New in version 1.1 :
Feature a new clipping method Recommended V2. The old V1 method was discarding too much of luminosity information. The new method is a better compromise between V1 and plain desaturation.