Between the Shield and the LC9s, I chose the Ruger... but what's best for me won't be the same cup or tea for everyone else.
I needed less weight due to back issues and the Shield didn't save me much over the double stack I had been carrying. I'll admit the Shield felt great in my hand, but it's still a 20 oz gun. Also, if I had to choose either gun with safeties, it would be the Ruger. The Shield's safety is too small and difficult to manipulate. If I bought the Shield, it would be sans safety.
I also prefer the LC9s trigger to the Shield trigger. Not by much... but some.
Again... YMMV.