Enjoy your GSG! It's an awesome gun.
One area you should pay attention to with your GSG is the cleanliness of the magazines, and the spring tension. All of my failure to fire issues have occurred on the second round coming out of a full magazine. It's been a sign of the mag being dirty. If I still get a light strike on my second round after cleaning the magazine, I'll give the spring under the follower a tug until its 6.5 to 7 inches in length. Seems like the spring doesn't push the cartridges up enough so the pistol has trouble stripping the second round off. This weirdness typically happens after I've run 200 rounds through the magazine.
