Many effects can be used as the images change, while the user can control their movement left or right. The dimension of the devices and hence the images may change from very small to very large.
Trendy Devices Image Rotator works with Mootools 1.2.4. So, you need to use Joomla version 1.5.19 or higher and to enable "System - Mootools Upgrade" in "Plugin Manager". There is no need to do that for Joomla 1.6, 1.7 and 2.5.
Workds out the box and works well at that.
It would be good to have just the normal option to display images but other than that its easy to use and effective in the right template.