My CBST sits over my kidney at about 7 o'clock. (I'm left handed.) It took a couple days to break it in, but now I hardly notice it's there. I regularly fall asleep on the couch with the CBST and SA XD sub 9 and only start getting uncomfortable if its a 3 hour nap or longer.
I carry day in and day out (no rules at work to forbid it) with a tucked in shirt and no one the wiser. I was in slacks and a tucked dress shirt and asked a friend to find the gun and he still couldn't.
I LOVE my CBST. And their service is EXCELLENT.