I love my 9mm Shield. It's my do-everything conceal carry gun. After about 300 rounds it loosened up nicely and can do some impressive work at the range when the guy holding onto it goes his part.
I had a Sig P238 and a Taurus TCP that I used to conceal as well, but I always ended up going back to the Shield because I prefer the 9mm round and it just fits my hand better. I sold the other guns and never looked back.