I've had 3 different 329s. Still have 2. The 329 is my all day every day carry gun. For my purposes, it has the ideal power to weight ratio. The 500 S&W Hogues are a very useful additon.
For 18 months or so, I shot them extensively (8,000 rounds of 240 to 325gr at 1,050 to 1,300 fps -- actual chronograph numbers). I stopped shooting them because the recoil was starting to bother my wrist, and I got tired of sending them back for repairs. Here is a list of the problems I encountered over that time frame.
=> S&W 329 – self destructed (barrel separated from frame) upon firing.
=> S&W 329 – hand spring jumped pin, rendering hand inoperable.
=> S&W 329 – internal lock engaged under recoil (2x)
=> S&W 329 – misfiring (light hits). Returned to S&W to replace firing pin.
=> S&W 329 – multiple instances (4 or 5) of blast shield/top strap erosion – S&W replaced shields (each time) and frames (as required).
=> S&W 329 - carry up fixed several times.
A couple of things to keep in mind with the 329s before you bet your life on one.
There have been a number of complaints, on various forums, about misfires due to weak firing pin hits. IIRC it has something to due with short pins installed to pass some Calif. safety test (don't hold me to that).
The lock has a tendency to self engage with heavy loads (mine have been disabled).
Gas shield/Top strap erosion is a problem with heavy use and magnum loads. The gas shield has to be installed by the factory. If gas shield is not fixed in time, the frame will erode and also need to be replaced.
Smith & Wesson fixed all problems listed above under warranty.
Most 329 owners will never shoot them enough to encounter some of the problems listed above.
FWIW,
Paul