Gary Coyne recently wrote a thorough review on Bokeh 2. It’s full of example images and helpful information. He explains what components make for good bokeh and gives suggestions for how to use it effectively.
He does a lot of comparing between the original Bokeh and the new version. This review is a good resource to learn what has changed between the versions.
Gary says “It does what it says it does and it does it well,” about the original Bokeh. But about Bokeh 2 he says, €œIt does what it says it does and it does it better.”