Well, not 'torture' exactly, but significant. I want to report on my experience over the last five days in which I was traveling, working a convention with thousands of people, living in a hotel, up, down, walking around, unloading boxes, going out to dinner with groups of people, etc. All of those things you normally do in a normal month of life, but amplified and crammed into five days.
As my usual mode is to carry whenever legally permitted, I knew I would be packing for all of the time except crashing out in my hotel room, so I needed a good holster that was secure, comfortable and unobtrusive. I took three for the LC9 - a Bullard Belt Slide leather OWB, a pjholster IWB and a basic, plain-Jane Remora.
The short version is that except for one day, when I wore the Bullard with a loose, tropical short-sleeve shirt all day, I ended up with the Remora. The pjholster didn't work for me because I tend to carry appendix style IWB and all of the bending, stooping, carrying, sitting for ten and twelve hours is not comfortable with a kydex holster. At least for me. I do like pjholsters if I'm going with kydex, which I often do around the town, but for this intensive, active period, I found the kydex too uncomfortable.
It's an SR9c in the Remora, but the LC9 is basically the same. (I'll post a photo of the LC9 and the Remora when I get the chance later today.)
The Remora did shift, but really not to any large extent. I never had to re-adjust it or worry about it coming out or being loose.
So, what the week's torture test told me was that the basic Remora worked as advertised and became my almost constant companion. If I had taken a model with a sweat shield, it would have been almost perfect.