All the galleries use a similar XML file as the data source which makes it possible to switch between galleries within minutes.
The galleries can be customized with the help of variables (speed of the slideshows, background images ,etc.) or a much easier way would be using the SlideshowBox online panel which helps you to customize the galleries quickly.
To sum up, the kit is very functional for anyone who wants to create an image gallery easily and a time-saver for all web designers/developers.
Also, the demo page featuring all the slideshows says it all.