I have a .45 4.5in with thumb safety....(I have had glocks as well) but I went with the thumb safety because it just makes me feel better having one in the house with a safety. I know safeties are mechanical and can fail but it does help put my mind at ease some what...lol. If I lived alone I probably wouldn't care. Having the safety is just another tool when teaching my kids how to shoot and about guns in general...which is probably more the reason I got the thumb safety.