Mas, I've been going back and forth with this dilemma for quite a while. I carry a Glock 19 and Glock 26 concealed for personal defense. I'd like to purchase a leather holster for IWB in the 3-4 o'clock position. I carry the Glocks in condition one. ("one in the tube") I trying to decide whether to have the holster made with a thumb break. My concern is safety. I heard a lot about the potential for NG's with thumb breaks getting inside the trigger guard during re-holstering. On the other hand I think the thumb break would offer the benefit of keeping the gun securely inside the holster during frequent exiting from automobiles, getting in and out of chairs, and other maneuvers. I figure a quick discrete check of the thumb break offers a good double check to know the pistol is still securely seated in the holster. What's your opinion? Is the thumb break as "dangerous" as many anecdotal stories maintain? Is a good quality open top leather holster enough to keep the pistol safely seated in the holster during everyday use? Thanks!