I have two Shields. No issues after several hundred rounds. Why two? I buy at LE prices so....
I also have a Glock 43 __a more recent purchase/ same LE pricing.
Have her check out the Shield. (My every day carry). Have her check out the Glock 43. Easier to rack but___in my opinion the trigger is too light for a defensive pistol. I put a LaserMax Guide Rod Laser on it and keep it close (very close) to my recliner. If she can handle a very light trigger she may like the G43. Accurate and reliable.
Another is the Ruger LC9S Pro. Ruger essentially took on the Shield to design this. Way too light of a trigger and the take down
"pin" is troublesome.
The three are very similar pistols. All accurate, reliable and easy to carry.
Again, my EDC is one of my Shields. The Ruger is the easiest to carry concealed but too light of a trigger. (I think Ruger accessed the Shield's forum and noticed all of those Apex trigger jobs.
Racking is a problem with a lot of ladies. (Mine too!__so she has a Airweight revolver!
Poli Viejo
P.S.
None of the three above is a bad choice.