I have a LC9 that I got in trade a couple years ago. Mine is the hammer fired not stricker fired model.
Dam thing is unstoppable! And I have tried! It has gone swimming with me a couple of times when bowfishing, covered in pocket lint and marsh muck. Rinse the crap off in the river and it functions perfectly.
Personally I think my 1911 is a more comfortable carry piece, but it will never see the kind of abuse I have put the LC9 through, and I don't know if it would keep running like the Ruger has.
Finish on the slide is coming off and it will start to "rust" if I don't wipe it down with oil regularly.
Also I pushed the tiny ass safety down "off" and left it off. Between the looong trigger and a good holster I believe it is perfectly safe. It is so small it's only purpose is to shut the lawyers up.
I have never shot a Shield so I can't compare the 2. Now Ruger has made the EC9s which is even cheaper and supposedly just as good.
The Shield is a known winner and I don't think you can go wrong with either.