FTb-n that's a pretty slick set up you have there, I may have to steal the idea!
I have the PeakDesign Capture Clip (the model before their current one-- mine doesn't have a female thread to screw the whole assembly onto a tripod or whatever it is that the latest one does).
All in all, I love it. It's great when you have a back pack for mounting your camera on the should strap-- which works well for me since I love hiking. For a heavier lens (5D3 + 70-200 2.
I do need to tighten up my belt if I'm not using my backpack as it will try to pull my pants down, and with the clip in the vertical position it does dig in a bit. I haven't tried their pad (or FTb-n's idea above), but if the pad works as advertised, I would recommend it for heavier lenses if you're using your belt. If you're using a backpack shoulder strap, heavier lenses still work pretty darn well.
Anywho, long story short (too late?) it works well, I wish it cost less so I could buy another, but overall I'm happy with it. The plate is basically permanently attached to the bottom of my camera and the clip is either on my belt or backpack whenever I am out shooting. I haven't seen a reason to look into any other system since I picked the Capture Clip up. It securely holds the camera out of the way when you don't need it and it's easy to grab the camera when you do.