Should be used with Art Timeline component.
Support has also been first class. I had an issue with one of my timelines, so I emailed the developer - they had it all working properly within a few hours, and even gave me some tips on CSS styling.
I hope this plugin continues to be developed and enhanced. I have a number of ideas for additions, including allowing the use of event categories within timelines (with different colours for each category), which would be great. It would also be very useful if you could use different dimension settings for individual timelines (at the moment one size fits all - which is fine for my needs so far).
If you exclude the Google widget, this is the only plug in of its kind for Joomla!, and it does the job admirably. Recommended *****