As far as I can tell they are indistinguishable from official Foundation cameras and only cost 1/3 the price. I bought six of these and they all work great. They also fit snugly in the official Pi Zero cases (note that the mounting pins in the cover's "camera holes" are not symmetrical about the cover's short axis, so as with any Pi camera, you'll need to make sure the cover is properly aligned -- If it doesn't fit as expected, rotate the cap 180 degrees). My only complaint is that the camera module itself isn't attached to the board, but instead hangs freely, secured only by a molded connector that tends to fall out. However, there's nothing a drop of glue can't fix.
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