I’ve seen those before, and I always thought they’d be a pain when you need to go to the bathroom. You couldn’t just unzip and go, I think you’d have to remove your pants and then rotate it out of the way. I somewhat similar system that is easier to go to the bathroom with is the
Pager Pal. I used to use mine to carry my Taurus 85 hammerless .38.
If you’d like one, check eBay, you can sometimes find them there a lot cheaper. I think I also have a smaller one for my Mustang. I don’t remember if I sold it, or if I still have it.
The thing is, you have to wear them with pants about a size larger than normal. And it’s less noticable if the legs are a little baggy. Otherwise, when you sit down, the muzzle points up a bit. It works pretty well though. I could carry the .38 and you couldn’t even tell it. It’s more comfortable with compact guns. I tried it recently with the G17, and it wasn’t very comfortable. It might have been better if I had some larger pants. The handle was kinda pushing into my waist. The .38 handle is much smaller and more comfortable.