My paternal grandfather had one of these. As a child, I was fascinated by the ingenuity. It takes some practice to learn how to use it efficiently, but once you get past the orientation, it is a magic instrument that takes me back to my youth and the energy and enthusiasm of a Scots/American farmer and contractor.

Works great for most screws. Original cordless screwdriver, battery never runs down unless I run out of juice.

My dad had a Yankee-style screwdriver, and when I helped him around the house during my early years, it was one of the most interesting and fascinating of all his tools. I hadn't thought much about it until recently, when I had a rash of screws to screw in or out, and they were the kind of screws that a cordless driver was a little too much, and a regular hand-powered driver was a pain in the butt after a while. Epiphany struck, and I thought, 'damn, I wish I had one of those racheting screwdrivers like Dad used to use..." Hence, the Yankee-style driver. In a tight spot, they're much easier to use than a normal driver, and because of the in/out motion rather than the circular motion for even a 'standard' racheting driver, they're just so much more convenient. My Kings County drivers is perfect, well balanced, smooth, and has an easy to use thumb-catch to toggle from in to out to fixed. Extra bits are stored in the hollow handle, and there's even enough room there to store another couple of bits if you have a favorite style or size. The bit-holding mechanism is secure, with a nice, tight metal band around the holder itself. Dad's tool had a smooth, beautiful wooden handle, but in these days, you get plastic, that's just the way it is. Of course, the old tool couldn't store extra bits, and if I remember, it didn't have removeable bits - just a fixed, slotted drive blade.
This Kings County tool is a must-have, especially for any homeowner who needs to be able to grab a screwdriver for a quick tighten or loosen job, and doesn't want to mess with a cordless or dig through the junk drawer for the phillips or the slotted or the square drive or the hex drive or the star drive...They're all in one here. Highly recommended.

This is not the smoothest tool but I sprayed it with silicone and that helped the tip to spin. I think that as I use it any roughness will become smooth.
The hex tip is a bit deep to accommodate the included double ended short bits, so regular short bits end up going a little too deep. They stick out enough to be useful but are right on the edge of disappearing into the hole. Longer shank bits work fine.
There is space in the handle for bits and a couple (future) drill bits. My old one had 3 drilling bits with traditional Yankee Screw Driver shanks, along with screw driver tips. But getting specialty tips was hard. The Hex setup of the tip should let me use different bits but I will need to buy drill bits with hex bases for full functionality.
There is a "looseness" or tiny bit of rotation in the shank when using it is a regular screw driver, but it is not bad and is as good or better than my old Yankee Screwdriver. Once I accept/remember it is there I compensate very little and just use it for that final tightening twist.
Overall I really like it and it may become the first screw driver I reach for.

Overall I really like it.

The larger version of this tool has a lock ring on it. That allows you to lock the bit in a retracted position and use the tool like a regular ratcheting screwdriver. While you can technically do the same with the bit extended, it is much more difficult to use that way.