This plugin is really thin on documentation and UI so it's not friendly for casual WordPress users, but for front end developers like myself, this is an extraordinary tool. It's not for everybody, because full size, high-quality images add a lot in terms of loading and not everybody has good, high-resolution images to use. I think it's great for artistic types and portfolio websites.
I ran into a bug where nothing was displayed, but... I just reuploaded my images and it worked fine. Great job, James.