Personally, I hated them, probably more than any other guns I've ever owned. I've had two Security Six's and a Speed Six. Traded the Speed 6 for some welding equipment, traded one Security 6 at a big loss, and gave the last one away.
They were bulky, barrel heavy, not accurate enough for my liking, and had a bad habit of pinching my chubby trigger fingers.
I was issued a Security Six while working security at a hospital. Once while we were qualifying along with a rent-a-cop agency I out shot their "ace" shooter so bad it was almost funny. Well, it was a riot. I was using my issued SS and he had a 6" model 19 that shaved lead really bad to the left side. He walked up to me and said that the reason I beat him was because my gun was better than his, to which I replied, "what?". He said that the Ruger was a better gun than the 'Smith and named off a bunch of reasons why. I told him to hold on a minute and I'd even the field a little for him, and pulled my own model 19 out of my car. I shot a 296 out of 300 and told him my version of the truth about S&Ws vs. Rugers.
I later found a Ruger ad in a gun magazine which listed every reason he had given me and I still wonder if he had ever really shot one.
It's all a personal preference on what you like and don't like.
