I like them. They shoot really good, and carry really good. The 9mm Shield is my wife's EDC. She tried the G42, but felt better with the thumb safety of the Shield.
I liked the shield in general but hated the thumb safety as it requires too much of a fine motor skill. I.e. elephant dung hits the fan that safety isn't going to be real easy to defeat. I'll stick to bigger guns that I can actually use as a club if I run out of bullets.