Here are some general tips, as well as recommendations and guidelines, for creating a good chord chart.
Simple is always better. Make it easy for the eyes and the brain to follow the flow.
While repeat sections, as well as a first and second ending, are valuable tools and make sense in many cases, they should not be overused—especially not when this is done not for musical reasons, but merely to save space.
Keep in mind that it also is difficult to add comments to repeat sections.
And look how, in the first example, you can tell just from the first visual impression that the verse and chorus are the same length. And each is 16 bars long.