The Aero Mini was built by WE, and as far as I know, the only knife that was, so far. The smoke and original Aero was built in the U.S. by another company. I do not know who built them though.
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I had a mini and it was nice. Smooth, no lock stick, very slight belly, fired fast (albeit quietly) and locked up solidly. It seemed like a quality little knife.
I wear an XL width glove and the peak of the bump on the inside of the handle landed right between my pinky and ring finger, with my pinky resting on the up curved portion. Comfortable, but a bit too small for my preferences.
I didn't touch the edge, so I don't even know how the factory edge was. It looked even, and didn't have any rolls or dings but I didn't even cut paper or arm hair with it... As soon as I saw it was a bit too small, it went back in the case, only to come out once more for pictures.