Product review (4 stars): Works fine
Overall, this is a good module, and works as expected.  The switch was just a little loose in the housing, not too bad, but I improved the feel of the switch by securing it with some hot glue on the back.  I also soldered all of the electrical connections, added heat shrink for insulation, and now I'm confident that I have a safe and secure power inlet.

It would have been nice to have received a schematic.  I'd still verify everything with a multimeter, but I can see how the wiring might not be obvious to everyone.  Also, mine came with a 5A fuse installed (ordered November 2014);  it seems like other people might be getting different fuses or none at all.