I think S&W customer service sucks.. After three separate phone calls trying to get the recall mod done on my no - 586 I've decided it's not worth the risk of losing it for months on end. Every phone call they said they would be sending out a shipping label that never was.. Ruger, however, was a very different experience. I bought a new GP 100 that was dropped and broke the rear sight blade. After a quick email, I received a new rear sight in the mail less than a week later no questions asked as to why I needed it. Not bashing S&W or touting Ruger, just my personal experience with the two companies.
When I first called about the recall on mine, they emailed me a shipping label in minutes.
I've only used S&W CS one other time for the grip recall on a 6906. That was last year, and I got it back in 10 days.
Bought a Ruger LCP from a person who claimed it had never been shot. About 90% of the time the slide wouldn't go forward without bumping it with my hand. I polished the ramp, but it didn't help. Watched a youtube video of a LCP strip, and noticed theirs had a double recoil spring. Mine only had one. Called Ruger and told them my problems and about the single spring. They said it shipped with a single spring, but would send me their "enhanced" recoil spring at no charge. Sent a old P95 back for the MKII recall and got it back in about 10 days. They offered me free shipping or a free mag. I took the shipping.
Had a titanium firing pin break into 3 pieces on a CMMG 22 upper. Emailed them pics of it and they sent me 2 in a few days. Still cant figure how that thing broke.