The gun came back in November. The sights were better, it took me only a click in windage to get them to where I wanted.
But the gun would not run. When I started firing it double-action, after the second or third cylinder-full, it locked up. I could not pull the trigger through. It took some pressure to open the cylinder; none of the primers were high. I was shooting FMJ practice ammo (W-W white box). This happened three times in a row.
I sent the gun back. It came back to me three days ago, with notes that they had adjusted the yoke, the ejection rod and the hand.
I took it to the range yesterday. Pretty much the same thing, except that it took four cylinders of cartridges for the problem to resurface. I was shooting it at about the pace that I would in a USPSA match; not slow, not overly fast.
I'll contact S&W CS next week. This will make three times in for repair for a gun with less than 200 rounds through it. I'm thinking of asking them to send me another gun or buy it back.
S&W is replacing the gun.