It's basically just the weakest link of an otherwise very nice rifle. The one 556 I've gotten to plink with was one of the smoothest, most accurate semi autos I've ever had the pleasure of assaulting clays and bottles with. XD
Followup: Nabbed a NIB p229 with NS and 1 magazine for $710 off of Gunbroker, now I'm just waiting for it to arrive at my FFL. It does not have the SRT however. Any of you guys out there know if it's something that's worth shipping it off to Sig to have installed?
Explanation I found on another site:
What's happening internally: Normally, when you depress the trigger on a DA/SA SIG pistol the firing pin block is pushed out of the way (allow the firing pin to slam past) and then the firing pin block falls down into its blocking position again. The reason the standard gun's reset is so long, then, is because the trigger bar needs to move forward far enough to reset and re-push the firing pin block again. The SRT uses a different safety lever which keeps the firing pin block in the out-of-the-way position through the entire slide cycle, so when the gun comes back into battery all you need to do is reset the trigger bar/sear connection ... which is much shorter.
You can feel what an SRT is like with any SIG. Clear the gun; verify it's clear; remove the slide & barrel; pull the trigger and hold it back; press down on the disconnector (the little arm sticking up from the trigger bar near the right grip panel) while keeping the trigger fully depressed; cock the hammer while keeping the trigger fully depressed; then let the trigger forward until you feel/hear the click. It's a lot shorter. Why? You reset the sear without having to deal with the firing pin block mechanism in the slide.
On your first gun, something that subtle will probably not make much of a difference to you.
I'd save that money for ammo and range fee's in the meantime. Simply going out and shooting at this point in your development will give you far greater gains than a slicker trigger. Learn to shoot first, then worry about the fine minutia. JMHO
Train safe bro!
Ditto what Don Gwinn said but gratz on your purchase anyway. As far as the SRT you should work on your fundamental skills before getting all fancy. I'd rather have solid skills that I can transition to other weapons then be used to a feature that is only on my weapon.
With that being said if self defense is your primary reason and you find this helps with your follow up then disregard what I said above. Your life comes above all else...
My first gun. Was new.