my concern would be in a physical confrontation its perfectly set up for a bad guy to grab.
I have a little something to add to this. I use the shoulder harness (Galco Miami Classic 2) because I'm in the sitting position for most of the day at work, and I find it comfortable when walking around. The bit I would like to add is how DIFFICULT it is for someone else to grab. Let me explain.
I found this out by mistake really. I was helping my brother move from his apartment and I was carrying a large cabinet from upstairs to downstairs. I lifted it and got it to the landing before starting down the steps. When I started, I thought about my pistol bouncing off the wall every step I took, so I called to my girlfriend to take it from me (my hands were full holding the cabinet, which wasn't heavy, but large and awkward). She reached in my shirt and tried to pull it from my holster (before anyone asks, she knew it was loaded, chambered and the safety was off - I told her before she reached for it). The strange thing was she couldn't pull it out. I told her to carefully pull harder, but she said it was stuck. I had her switch sides, and she still could not remove it. I thought it might be somehow stuck, so I backed up, put the cabinet down, and pulled it without any resistance.
After standing there scratching my head, I asked her what she was doing wrong. She only could say that standing beside me or in front of me caused it to bind, and she couldn't pull it out of the holster. When I reach in (cross-draw) it slips right out (like pulling it straight out of the holster because it sits angled under your arm for the draw). It made me wonder if someone could actually take it, so I emptied the pistol, put it back and told her to take it forcibly (without me fighting and without her breaking the straps from swinging on them). Two things happened, either the front sight would catch from her pulling at a strange angle, or the holster would “bind” or twist, causing a great deal of friction, making it almost impossible to pull it out. Now I’m not saying it can’t be pulled, any large individual yanking on the straps might break it loose, or they could reach under my right arm and kind of cross-draw to take it, but that seems difficult for someone to do let alone know that’s how to take it....
I thought i'd throw that out there...