James,
I spent about 5 hours with my new Hofi Hammer on Sunday. I really liked the feel of the handle, especially when I maintained a loose grip. It was pretty uncomfortable when I used the Grip-O-Death. Also found that by using the looser grip I was moving metal much faster. I also found that the balance of the hammer made it easier to control. I know that everyone has their favorite style of hammer but I would imagine that a well balanced one, regardless of style, with a handle that is comfortable for the user and used with good form will help prevent or reduce hand pain.