I have one. It failed to fire 1-2 bullets per cylinder when I got it used but unfired. The springs had not been replaced, because the trigger was the heaviest S&W trigger I have felt.

I replaced the springs with Wilsons and the firing pin with a Apex, and since then it at least has been reliable. That said, it's my least favorite revolver and stays in the safe. My 3" M629 gets carried every day.

The 686 is like a hunchback K frame. There's something off about it. My 686 is like my Glock 19 - I keep it mostly to remind myself why I don't like them.