I did notice one of the flaws that was common in S&Ws that were made about 1976-81,, The barrel is not 'pinned' and that sometimes allowed the large caliber handguns to torque the barrels to the left, throwing the sights off to a considerable degree...Otherwise, it appears to be a nice weapon...
We (police department) wound up sending approximately 100 back to S&W due to the defect, except ours were .357 magnums..
All of the barrels had twisted in the frames after the first qualification, when we required the qualification to be with full strength street loads, rather than the lower powered .38 spl in an attempt to save money and the legal department, following an opinion request from the Firearms Instructors, about the liability issue..
Earlier S&Ws has the barrels pinned with a pin through the frame, locking the barrel in place, and S&W had started eliminating the pin in a cost cutting measure..