You should pay attention to the one semi auto pistol S&W sells that has useful features not found done better in another brand they copied.
Shield 9mm first choice over Ruger LC9s, the striker Ruger.
Shield has safety, but I never put it on, so it doesn't ever need off'ed.
7 and 8 round mags make Shield into two guns. Slightly too big pocket gun or belt holster gem.
Ruger grip too short for recoil, but is slightly better pocket size. Longer Ruger grip a joke.
Shield trigger like a really good Glock, smoother but slightly heavier. Shield trigger way better than full size M&P line triggers.
Ruger trigger better but I kept pulling it through. It just starts and goes. The Ruger trigger is shorter and lighter in pull than the Shield which might seem good, but if I switch back and forth between several guns, the Ruger trigger just pulls all the way through if started to the rear. It is maybe too short and too light??
Shield works. Hornady Critical Defense 115 perfect. Would not feed 135 Critical Duty ammo.
A single failure to eject in the first 200 rounds of break in ammo with Shield , but last 800 since then perfect.
(I see the other thread about Mom and the daughters being unable to make a Shield run. but Daddy shoots it perfectly. No clue what that is about. My Shield has been shot by several normal size/strength people including women and it works perfectly.)