Yesterday was my first outing to the range with it.
Here are my less-than-exhaustive impressions:
1. This thing is small. It is smaller than the Colt Mustang Pocketlite I used to have. I don't have a Kel-Tec to compare it with, but it is small. I have an Uncle Mike's Sidekick pocket holster, Size 3. It was a good fit for the Mustang. It appears to be a size too big for the DB.
2. The sights are ok. Three dots, with the front sight much bigger. Think XS Big Dot-wannabe, but painted on.
3. The trigger pull isn't heavy, but it is long. It reminds me of a Kahr, but it doesn't have much of a reset.
4. Practical accuracy seems good.
5. Reliability is an open question. The first 20 rounds of WWB ran flawlessly. My daughter, who is 15 and normally shoots a G26, had two Failures to Extract. I think she limp-wristed the gun a bit. I ran 15 rounds of Winchester SXT 95 gr JHP thru it, no problems. I need to shoot it more before I bet my life on it.
6. Slide bite. My Size Medium hand plumped up enough to get in the way of the slide a little.
7. Magazines don't drop free. Hitting the magazine release drops the magazine about an inch. From there, it has to be ripped out. Since I don't yet have a spare magazine, this is a currently a secondary issue.
The DB doesn't have a slide lock. That makes for a smoother, more pocket-friendly design. However, it doesn't give you any feedback when it is empty.
The absence of a slide lock isn't a big deal, but a reload will consist of click - magazine release - rip out magazine - replace new magazine - rack slide.
I don't envision this as a primary gun, except in an Non-Permissive Environment. I see it in a secondary role, so having a spare magazine on my person and dealing with a sub-optimum reloading drill is probably not going to be a big deal.