I love this brush! It simulates the tactile experience of painting with real
media very well. If you are having lag issues, it is a software issue, not the
brush. It is just a capacitive brush, there's no special input.
This pen is brilliant for inking and sketching, the firm but flexible tip gives
you a nice controlled line weight. I have sketched through an army of these pens
along with the gray ink version. The ink is very sensitive to water though, and
it sometimes leaks.