There are four benefits, such that since buying an 12v elu off ebay
three years ago I would never (unless stuck up a ladder with a
drill/driver) choose to drive a screw with either of my cordless drills
(14.4v and 18v). First advantage is more power for really big screws
or coachbolts, or just more speed with any else. The second is that
the impulsed nature of the power means that there is no torque
reaction, so it doesn't try to twist your wrist off no matter how hard
it is working. The third is that you don't get cam-out, ever -
although it does eat bits, especially rubbish ones, I've never had one
explode like the OP. The fourth is that it is far far more
controllable, so you can guage the speed and depth to which you are
driving much more accurately.

I can't see how anyone who has ever actually used one could not
recognise that they are utterly superior for driving screws - the
difference is night and day.

Sorry if this posting is munged - using google while I find an
alternative newsfeed thanks to my ISP terminating its provision.