I bought four of these a couple of months back at $2.84 delivered. They are still available. All have registered on the USB bus and two have been tested on all pins via volt meter (and an uno driving inputs) and python serial. So as far as I know, they are good-n-cheap. It has all of the signals broken out on three of the edges. I'm very happy with these.
I soldered headers to one of them and will do the same with at least a second. I also straightened and shortened the 90-degree headers on the end which came with it. ts now ready to plug into a set of complimentary headers on the bottom of my my arduino project board.