I had used Hypershot until they "Shot" me down ::)
I just discovered Keyshot a few days ago. I'm happy to see a lot of things needed in hypershot are now implimented in keyshot.
my first scene with keyshot
(http://lh3.ggpht.com/_PyQCgoVXTng/TSzvJvIIOWI/AAAAAAAADz0/ndtx2ZqhWHA/s640/P00811150_29.jpg)