I think its much harder to conceal a pistol in a shoulder holster than it is in a IWB holster. While its true you do need to wear a cover garment with both, the shoulder holster is more prone to being spotted, either visually or printing. With a IWB, you can wear a light, untucked shirt and get away without any trouble, you really cant do this with a shoulder holster. With the IWB you can also take the cover garment off and still get away with it without to much attention. With the shoulder holster, you need to worry about the straps/harness printing as much as the gun, especially if what your wearing is drawn across your back and shoulders when you bend forward. You also have to worry about the coat swinging open as your reach down or forward. A big downside to the shoulder holster is, it presents the pistol, butt first, to anyone in front of you, just something else you need to watch out for. For serious everyday carry, I dont think they are a good choice. For special uses, they have merit, as do a lot of other holsters that wouldnt be practical for everyday carry either.