Yes, I used it some time ago. The only nice change I noted was the windows, gimpshop puts all the windows of gimp as childs of another maximized window. If you close / iconify / whatever you do with the root window, all the parents do the same, as in photoshop. I found all those gimp windows a little annoying and hard to manage, but I am used to them now. I think uninstalled it because of some changes on the menu, I was to used to the standard gimp config.
It is an option, I guess El Gimp is not too much user friendly anyway.