Speaking of marksmanship, the M42 is surprisingly accurate. Just for fun, I set up a man-size target at 100 yards and had no problem getting hits on paper.
The ultimate measure of a firearm's utility for personal protection is whether you would actually use it. In the case of the M42, I would carry it without hesitation. It is reliable and portable, points easily, and, like other Glocks, doesn't have any type of external safety that needs to be manipulated. Just draw the pistol and it is ready to go. Whether as a backup gun or as a primary gun when deep concealment is called for, the M42 is a pistol you can count on.