I've owned several. Nice guns. I always thought the yoke assembly looked weak, but I never had any problems with it.
Didn't have chamfered chambers, so loading/reloading was sticky. I took about half a jillionth of an inch off the sharp edges with a case deburring tool; that fixed that.
The cylinder latch is sharp, though, and used to draw blood from my thumb.
I wouldn't hesitate to carry an Undercover for self-defense. Good basic gun.