Picked up my replacement snubby this afternoon, after my wife took a shine to my Taurus titanium snubby and claimed it for herself.
Here is S&W's page on the 638
http://www.smith-wesson.com/webapp/wcs/stores/servlet/Product4_750001_750051_764944_-1_757768_757767_757751_ProductDisplayErrorView_YBought it from Becky at Sporting Arms. Becky is good people and I do not hesitate to send folk to her.
http://www.sportingarms.com/===============
I gotta say that my initial impressions are quite favorable.
Fit & finish are outstanding.
Better than my Taurus and better than my FIL's Ruger SP101. The former is just not as slick/tight/smooth and the latter, while robust and of high quality, lacked in the finished product. Better than my early 1980's SW629, too. Truly, better than most S&W's I have seen, save those produced during the heyday of S&W hand-finished guns. S&W is doing something right. Maybe with just this gun, maybe in general. I would have to examine more newly produced S&W hardware. I will take donations of new S&W hardware in the interests of science.
Trigger
Really smooth, both DA and SA. So smooth, it doesn't need my usual several thousand dry-fires while watching teevee(a) and doesn't need a gunsmith to smooth it up. I am really happy with how smooth it is. Trigger weight is good, but not great. Stupid easy to stage. It doesn't stack, but if you ease your trigger squeeze after you've gone into it, you sorta fall naturally into the stage and then can tip it over. Pulling right through is smooth and as I wrote, no stacking. My Taurus snubby with Wolff spring kit is lighter and I have already ordered a Wolff spring kit for the SW638. But, it really is pretty good and much better than I expected on a snubby. For instance, back when I bought the Taurus, it had a smoother and lighter trigger than its SW642 neighbor (ten years ago or so). Trigger is not as light as the Ruger LCR revolvers I have dry fired. Those are awfully good, light triggers if you can abide their LONG travel.
Thumb Latch and cylinder
Again, smooth in action. Smoother than my Taurus and makes me want to disassemble Da Bull and take an emery cloth and dremel w/ jeweler's rouge to the steel bits. Lock up is tighttighttight and no end shake. Cylinder/forcing cone gap is not what I would have had a gunsmith set for me, being overly generous for maximizing velocity. But, it will likely never foul and bind after even the vilest cartridges.
Sights
Fixed, but pretty decent. All orthogonal & straight edges in the sight picture. Any angles or curves in the sight picture make a snubby harder to shoot.
At $396 ($429 with tax) this is a lot of value in a firearm.
That's about it for the preliminaries. Of course none of it means diddly if it doesn't work on the range, can't shoot straight, or has dispersion measured in feet.
Plans
1. Take it to the range. Shoot Fed Gold Match 148gr HBWC, Rem 158gr +P LSWCHP FBI load, Underwood 150gr HCWC, Fiocchi match 148gr HBWC, and Hornady 158gr std pressure XTP. Those are the preferred social loads for the roo_ster clan. Test for reliability and look to see if POA~POI. Shoot other range fodder.
2. Play with the Wolff spring kit, remove The Lock, and replace The Lock with The Plug(b). Lube innards.
3. Shoot preferred social ammo again to see if reliable. Crawfish if not.
4. Keep eyes peeled for Crimson Trace LG105 grips after mad money account built back up.
(a) Might still do it anyways. And have the kiddos work it, too, to strengthen their grip and trigger fingers. Will fish out my .38spl snap caps.
(b)
http://smith-wessonforum.com/s-w-revolvers-1980-present/102217-plug-s-w-j-frame.html &
http://smith-wessonforum.com/accessories-misc-sale-trade/460110-plug-lock-replacement-new-prices.html?highlight=plug