The one I use is alot like this one:
I hardly feel the gun at all and distributes the weight of the gun evenly. Works even with my Vest on.
It's also great for the ambidextrous person such as myself.
Only issue I have is that I cannot "stow" the gun anywhere. I can't sling it behind my back or anything. I either have to hold on to it or let it hang there and flop around.
I recently ordered the drop leg holster from The Vest Guy and I wasn't impressed with their communications. I received no shipping confirmation and no response to any of my e-mails.
Now that it's here (finally) the buckles aren't the best and they make noise when I walk.