Selling my Shield to get a PPS or XDs both sides of which I think are better than the Shield.
With the Shield, you can't use your thump to release the Slide Stop because it's extremely difficult. As you already mentioned, the recoil spring is super stiff, and I don't care what anyone says, it doesn't get much better. IMHO, the grip feels better on the XDs. The XDs ships with better sights. Last, but not least, for what ever reason, S&W REFUSES to ship a lot of parts if you should need them. Instead, they require that you ship your entire firearm back to them so that they can install a part that you could have very well installed yourself.