GreyBox is a refreshing new way of showing images... prettier than lightbox or thickbox IMHO. This module was very easy to install, and worked immediately... for 10 minutes. I'm working through why it isn't any more, but at this stage I haven't got it going again - probably something I did (The only thing I did was fiddle a bit with the plugin order in the plugins page). However, on the grounds that it worked out of the box, and looked great I give this module the big thumbs up :)