I've got an older Blade-tech belt slide for my CS45. I had it made with a slightly lower opening in front than normal (which I was told is not IDPA legal, but I told them i wasn't ordering it for gaming gear). I also have a Hume H726, which is what I like to carry it in when riding my motorcycle (for security).
I don't have a handy picture of the BT, but I do have one of the H726. Granted, it's an older 726 made back when they used tunnel loops instead of open slots for the belt.
This was my favorite holster for off-duty & plainclothes for many years, and remains a favored holster for different pistols now that I'm retired. It's a semi-open breakfront that has a low from opening, but a thumbsnap for secure retention. The lowered front makes it very fast for drawing/presentation because the end of the slide can clear the holster sooner, and therefore more lucidly, than having to lift the muzzle up and over the front of the typical pocket-type belt holster. Easier on shoulders which may be a bit stiff due to older injuries, too, since you don't have to lift the shoulder and arm quite so high.
These pictures shows a pair of the 726 holsters from the front, with the older version on the right (3913) and the newer one on the left (4513). You can see the difference in belt loops and the lowered front opening.
This shows the new model from the side.
I can say that it's speed and ease of presentation surprised more than a few folks when I wore it as a working plainclothes holster and had cause to make a fast presentation.
The only thing I don't care for as much with the newer version is that they've replaced the adhesive patch which covered the outboard strap's snap base with a snap-on plastic button. When I was using a couple of the newer models for a couple of different guns I noticed that the plastic cap would sometimes snag and catch on the right side ambi lever (other 3rd gen TDA pistols). I felt this catch as a drag during drawing.
At one point the plastic cap was actually pulled off the strap. I decided to replace the plastic cap with one of the older adhesive cloth dots (which I'd ordered from Hume some years before, but which I've seen in craft stores since then, which makes sense when you think about it, since they'd use something off-the-shelf when possible for something they aren't making in-house). That made it feel just as smooth and snag-free as the older holsters I own and use.
I just wish I'd have known to order the 726 holster way back when they were still making them for revolvers.