This plugin is just Awesome! It caches it own images in its own folders taking a huge load of my thumbnail heavy shopping site. It works even better than it says it will. The customization features of the widgets have allowed me to open up new channels of shopping options with thumbnail support based on categories, post offset, different thumbnail size and more... And, this is just the free version.
Take a look at the bottom of my site to see what I mean. All the recent best deals and trending right now widgets are made by this plugin flawlessly and easily. So, easy in fact that I deleted a bunch of other plugins that I was using to try and create this effect.
Couple this plugin with Supercache, CDN Synctool, MY CDN, JSDeliver, Google Library, BJ LazyLoad and WidgetCache and you can have a smoking fast image and thumbnail dependent site up and running in no time.
Thanks for the great plugin! I plan to to upgrade.