Aside from those concerns, the primary reason I don't use what I find to be a very handy design is that it's not a good concealment holster. It's too bulky, too thick, and rides too far out from the body.
I've discussed that with Blackhawk & the guy I spoke to there agreed.
As far as using it for a range or other open carry function goes, the release process is so totally different from the normal thumbbreak holster I carry every day that under stress I'd not be able to get the pistol out in a hurry.
Running back & forth between too such distinctly different release types would almost certainly be fatal for me.
I have too many years in my muscle memory with thumbbreaks. In a hurry, I'd automatically revert to "thumbing" the release, not "fingering" it.
I stick with one system that works best for me. Like pistols themselves, I don't switch holster types around to match either my mood or the urge to go with something different this week.
Concealed around town or open carry in the wilds, all use a thumbbreak if they have any type of retention device at all beyond just a tight fit, because that type of release is so automatic for me.
Years ago I was testing a Smith & Wesson in a breakfront holster. I was timing myself out of the leather & on target.
I told my hand to remember "push forward, don't pull up" several times, closed my eyes & chanted it, visualized myself doing it.
When my buddy hit the timer button my hand instantly forgot everything I'd just told it & pulled up. Obviously, I had to do a couple retakes. And that was only under the extremely mild "stress" of the timer.
I do like the release on the Serpa (it's actually one of the only plastic holsters I'd even consider using), and if they can ever produce one that's much thinner I'd give it a good whirl for concealed use.
In the meantime- no. Too bulky for daily wear & too risky for occasional wear.
If you're in a position to use nothing but the Serpa, that'd be a different matter.
Denis