I wanted to add one more brand to the list: Cimarron.
My first ever handgun was a Cimarron Plinkerton in .22LR. Not long after I purchased it, I found that the cylinder would not go into lockdown when the hammer dropped. In fact, it could freely rotate out of position with the hammer all the way down when fired. Thankfully, I never experienced anything more than a spattering of a small amount of lead on my hands, the couple of times I shot it before discovering the problem. Out of concern for safety, I called Chiappa, who handles their customer support and repairs, and requested that they look at it. I also requested that they fit a 22WMR cylinder to the gun while it was in for service. I was charged around $75 plus shipping to get the gun taken care of. When it came back, the new 22WMR cylinder was a good fit with good lockdown and timing, the 22LR cylinder was still able to free rotate when the hammer dropped. Quite frankly, I was a bit shocked that they shipped it back that way. In fact, I cannot recall if I even shot it at all after that, for fear of safety. I ended up trading it away as a 22 magnum only soon after for something better.
I know that the Plinkerton is one of Cimarron's low-end **** guns, and that they do make a lot of high quality SA revolvers that are fairly good. I have chosen not to buy from them again because of the demonstrated lack of care in the repair of my gun. I don't feel that I can trust them or their products because of this, as well as having an uncertainty of how far through the company and product lines this lack of care goes.
I will add that I have had my share of problems with several of the firearms I have owned, and generally my experience with customer service from the likes of Smith and Wesson, Beretta, Ruger, Colt, and even Taurus, has been positive. Usually, but not always, it takes more than a malfunction to turn me off from a specific brand or a specific gun.