Most talk here has been general complaining about quality control at S&W. I cannot say that any of that does any good.
There is no consensus among us on those issues, however it may be wise to understand that with Smith, as it is with every other manufacturer of every other product these days, the end user is the quality control department.
We Boomers used to have a saying,
"Never buy a pig in a poke!"
This saying was particularly applicable during the early days of catalog buying from the Sears & Roebuck Catalog. We as a society learned the hard way that catalog buying has serious drawbacks. Now we are doing it all over again, but we are calling it "online shopping". The modern poke includes the pictures of the gun and the feedback on the seller. The guns online which command the highest prices are not the better products, but they do have the better photography. Caveat emptor!
S&W guarantee is good, and they will take care of you, but it takes some time. Personally, I have been following the saga of the Bodyguard 2.0 which I believe illustrates the modern paradigm. The worst case I heard of had to be sent back three times, then they gave him another gun. Communication was good.
Similar story with the reintroduction of the Colt Python.
It will be interesting to see, and it is too early to tell, but I expect the same story with the no-lock revolvers.
We have a well-moderated forum here and in the past the subject of the blankety blank lock has been controlled as divisive and hostile, with no real benefit to readers. Please see the sticky about this at the top of the revolver page by Mas Ayoob.
Your local gun store ought to let you get one on approval.
When it comes can you inspect yours in store, and reject it?
Seems to me that would be the way.
Tell us all about it.
Kind Regards!
BrianD