I have four, three Shields - two 9mm / one 45 - and a 5" FDE 2.0 in 9mm.

One 9mm Shield runs the factory trigger - which was actually acceptable, and a TLR-6. The other 9mm went to Business End Customs for TFX installation and a trigger job. BEC does not replace any of the factory fire control system, they polish, tune (somehow) and work some magic - excellent trigger. The 45 Shield came with a pretty decent trigger. I put TFX Pro sights on it.

I put TFX Pro sights on the FDE 2.0. It has a good trigger from the factory - supposedly S&W does something different on the 2.0 pistol triggers.