I'm a fanboy. But what I like about the gun is that even though they were not the first polymer pistol, they caught some of the older firearms makers asleep.
While Smith and Wesson was content to keep pedaling it's guns that were basically copies of the Walther design, Glock was thinking out of the box.
They made a reliable and rugged gun, at an affordable price, that is easy to maintain, and had an original idea.
They forced the other makers to try harder, and the competition they created in the handgun world benefited everyone.