Product review (4 stars): Perfect replacement
I was lucky that this part was a perfect replacement and solved my built-in microwave issue.  Please be aware that some microwaves, like my Electrolux / Frigidaire actually have three of these type switches in the door mechanism.  It turns out that two of these are identical while the third looks the same but has a slightly different blade orientation.  If you swap the wrong one in, you will find that the microwave works in reverse. It actually runs when the door is open and turns off when the door closes.  Again, I was lucky that this one was the one of the three that needed replacing.  Please check carefully before ordering and good luck.  For ~ $7.00, it sure beats buying a new microwave or having it serviced by a technician.