Here's my list:
M-629, 3 years ago. Good to go, no issues, outstanding accuracy
M-69, 2 years ago. Good to go, no issues, outstanding accuracy
M-69, 1-1/2 years ago, Good to go, no issues, outstanding accuracy
M-637, 5 years ago, cylinder locked up at less than 100 rounds, S&W serviced it in less than two weeks, Good to go, no issues since. Good accuracy
M-63, 1 year ago, Cylinder locked up in DA mode, less than 100 rounds, S&W serviced it, replaced cylinder, hand, trigger and did a trigger job, in 5 months. Good to go since, good accuracy.
M&P .22 Compact 3 weeks ago, Good to go, lousy trigger but improving, no other issues, very reliable and with good/great accuracy.
S&W customer service has been outstanding but the quality control people are letting a lot of guns through that wouldn't have left the factory years ago. Each of the above were shipped and fixed on S&W's dime with polite knowledgeable people on the phone answering questions.
Best Regards, Rod