I carry a one-handed sentinel all the time. It is one of my favorite and most oft-used EDC folders.
However, I tend to think that you (ChrisFarms) would not be happy with it, for its lack of defensive capabilities (you're the guy who spray-painted his Buck Bantam black, right?) Two issues with the Sentinel you might find unattractive:
1) It has a rounded tip. The tip is not sharp, or even pointy. Not a stabbing weapon at all. I know most younger guys or newer guys to the hobby like to know that their EDC knife could kill somebody if it had to, lol.
2) the handle shape is extremely ergonomic for EDC tasks, however the scale material, which is a plastic/nylon type material, is not grippy. So any icepick-style stabbling motions or forehand stabbing would be ill-advised at one's hand would not have extreme purchase on the blade.
As far as the steel, it's their proprietary recipe, but as a user above me pointed out it's edge retention is comparable to many other steels and that's been my experience. There's no question you can get it wicked sharp and it will come that way out of the box.
I know the name "sentinel" seems to indicate some defensive capabilities, but the name belies what it really is: a good, solid EDC user for the money and not much more.