If it's run on on a Surface Pro tablet it makes full use of the touch capabilities and of course it fully uses pen systems on non-touch systems.
The package is easy to use (even for a non artist) and it doesn't take much time to get used to the various controls and painting techniques such as smearing and blending of oil paints and watercolours that flow into each other.
There's also nice features such as stencils (which can be painted on, but the paint only applies to the empty spaces on the stencil) and stickers that are just stuck onto a painting.
A nice feature is tracing where an image is loaded as the background - but not as part of the image being painted - and then it can be traced. When it's saved, it's only the tracing and not the original image, though the same process could be achieved using layers.
Artrage also fully supports Wacom features available with some of their stylus' such as Pressure, Tilt, Barrel Rotation, and the Airbrush Wheel.
It's available for $49.90 from the Artrage Store. There is also a version available for Apple's iPhone/iPad.