- one of the best color blending visually, - light software size, - psd compatible, - 2 window options, - really easy to use, - line correction stabilizer, - really easy interface, - ease of creating and saving new brushes, - compatible with most systems and tablets, - there are lots and lots of sai tutorials and brush settings, and the community is really welcoming and helpful, - it can me copied on a pendrive and moved between machines - no need for reinstall.

I know a lot of artists use Photoshop or Illustrator to draw digitally, but since SAI is specifically geared towards drawing, it's a lot more user-friendly and direct. Also, it takes up much less RAM and is portable, so I can use it whenever and wherever I want.

The brushes on paint tool sai are definitelly it's stronger point, The default brushes are amazing and you can create your own. the other thing amazing about paint tool sai it's the color scheme visualitation, the sample menu and the color mix tool.