The straight or offset shaft is a personal preference. Some
golfers like to have their hands ahead of the ball and the
offset shaft
gives them this look. If you like to see your hands in line with
the head then the
straight shaft is better. With
the offset shaft the putter can be face balanced or partially
toe weighted. The straight shaft has what is known as a north
south putter. The head hangs vertically up and down when you
hold the shaft in your hands. A face balanced putter will be
horizontal to the world. The teaching pros say that if you have
a straight back and through stroke then you should use a face
balanced putter. If you do a slight rotation with the putter
then a toe weighted putter is supposed to be better.
The location of the shaft is also a personal preference. The
heel location is standard in the industry but the center shafted
putter is gain favorability as there is less rotation of the
putter head on off center hits.
If you like to use the entire head for speed control from heel
to toe. Off the toe for downhill or fast greens and off the heel
for slow or uphill greens then the heel position is best for
better speed control.