I have owned a standard shield.
I cerakoted a customers shield pro, and test fired afterwards.
The differences were noticeable. Lighter trigger, more visible sights, less recoil, louder, more flash at the muzzle.
I am not of the opinion that the differences were significant enough for me to spend more money on it than a standard. That's a very subjective opinion.
If its intended use is a CCW, some are of the opinion that a ported barrel is a negative aspect due to it "ruining your night vision". I'm no super secret squirrel operator, so I don't think its something for me to take into consideration. A lot more things affect my split times than my barrel being ported. You may have already mastered those things. I'd prefer the additional velocity out of an already short barrel.
Sights can be changed out. I prefer tritium over fiber optic sights for a carry gun; easier for me to see in low light. TFX's are my personal favorite. Sight choices are about as subjective as it can get in regards to firearms.
The trigger felt a little lighter, but I didn't gauge it. It wasn't anything to write home about.
It does look really cool, and is unique. I've bought things for less reason than that.
Overall, I think they made a game gun out of a solid carry gun instead of making a better carry gun. I think its a great gun, and would be confident in carrying it for defensive use.
I'm sorry I couldn't give you a less subjective opinion.
