Great once you get it configured properly
First, I have a reconstructed shoulder, so the geometry is quite a bit different between my "good" shoulder and my rebuilt shoulder - which was not something I had considered before buying. In the end, it didn't matter, though it took me 5-6 adjustments over 3-4 weeks to get the holster configured adequately. It's probably not something most people need to worry about, but the good news is that you can make it work.
I decided to try a shoulder holster because my IWB holster was starting to cause lower back pain. It also seemed like a better holster for the winter and when driving. It turns out that the Miami Classic II excels in all of these areas. It is everything that I wanted.
I would recommend this holster to anyone considering a shoulder holster. It is incredibly comfortable - even after wearing it all day, secure, easy to access (draw and re-holster), and well made.
I purchased the Horizontal Shoulder System Tie Down set as part of my order. It looks like a great product, but it turns out that I did not need it. I was initially concerned that there would be too much movement of the holster or it would not feel secure enough, but neither was the case.