My only complaint about the Shield is the trigger. But it isn't meant for competition. It is meant for CC. And it is great for that. Very easy to conceal. I recently got my CCDW License. I don't foresee switching to another gun for EDC for a long time.
Plus, and I may be in the minority, I love having a manual safety since it does not have a grip safety.
The trigger reminds me more of a Sigma than a M&P. Take up is longer than my M&P and is at least 2 lbs heavier. But it does have a crisp break and a much better reset than my VTAC. All in all, I am very happy with the gun. I may be interested in the XDS 9mm when it comes out, but the grip on the XDS 45 leaves a lot to be desired IMHO.
If guns kill people, mine are defective.