Square Head Drivers have been a hot topic, so here's a closer look into the question of what a golfer can gain by switching to a square driver.  Like other 460cc drivers, square drivers have excellent MOI, thus improving distance of off-center hits.  Square drivers also produce a distinct sound difference between centered and off-centered hits, giving useful feedback about what happened at impact.

The main characteristic when considering "going square" is actually the most obvious one; Shape!  Look at the clubs from the top, as you would from your address position.  If you're more comfortable with the traditional pear-shaped head, don't force yourself into a shape you don't see yourself adjusting to.  Geometry 101 says, a square is much easier to align to a target then an oval.  Golfers find this to be the biggest benefit of the square drivers, giving them greater accuracy and more confidence at the address position.