Personally, I prefer shoulder holsters over any other type of holster. Yes, the down side is you can't take your jacket off if it gets to warm, but when I CCW with the shoulder holster, I know in advance that my jacket will stay on.
As far a JR Roscoe, I have never owned one or seen one in person but from the web site pictures, I didn't care for the design or looks.
I prefer more traditional shoulder holster types like these:
Premium Leather Shoulder Holster Set - www.Holsterama.com