Frankly, I don't see much use of this. There are numerous 3rd-party alternatives for grabs out there, many of which are free. Check the 'Similar Apps' in the sidebar for some examples.

One that I really recommend, for grabbing pixel colors off of the screen (among many other features) is Painter's Picker, which (although not free) constitutes a one-stop-shop for picking colors and making swatch sets, etc.

i have to hold a color, i can't copy+paste...etc. Can anyone tell me how this is usable compared with the regular built-in colorpicker?