In my carefully considered opinion, as a shooter, it that the CS-1 is a premium revolver in every way. Mine came with a very nice action and it only got better when I added a spring kit. It has an excellent single action trigger, also. I had a very nice Ruger Security Six that I had work on the action done by a professional. It seemed ok in every way. Off a rest it shot perfectly ok. However, I could never shoot it offhand worth a hoot. I am a reasonably accomplished Bullseye shooter, had no problems with any number of Smiths but was never able to shoot the Ruger. It went on down the road.
My CS -1 shot well right out of the box. A 4" barrel "does not a target gun, make", however I shot it nearly as well as my longer barreled revolvers. It is about the ideal platform for the .357 magnum, IMO. It makes a superb trail gun for the woods rambler. It's an ideal handgun for the bird hunter (for sitting rabbits and wounded grouse).
I would hate to have to say, "I told you so" a year from now when you are bemoaning the loss of your 4" CS-1...
Dale53