I was at a private range yesterday observing part of a class that was going on. Was comparing my 19 to the new CZ. The instructor thought my Glock was broken. He had no idea what a striker control device was so I did an impromptu demo for him and the class. It was like I was showing them magic or witchcraft or something. Most of the students didn't really understand the why behind it but I didn't think any of them carried appendix either. The instructor really liked it though.
Have also shown it two a couple of range safeties at my home range. Some guys "get it" right away and some don't.