Using Cage Transform On a Photograph In GIMP 2.8

I recently started playing with the Cage Transform tool in GIMP 2.8 and have been discovering some of the areas it’s more and less useful. In this video I use Cage Transform to deform a photograph. Anyone else successfully using this tool?

Full Tutorial at http://beginlinux.com/blog/2012/06/cage-transforming-a-photograph/

Also, learned a lot on this topic at: http://www.littlewebhut.com/gimp/