Very good idea!! As a licensed electrician I can confirm that this little gadget works as good as a hard wired GFCI receptacle, so if are not confident to wire one in or there is not enough space in the box to put in the regular fat GFCI, pick up this one and you're protected! And what even better is that if you plug it into the lower socket of the duplex, you're still able to use the upper socket as a regular one.