Product review (3 stars): Part is fine, check your master control box connections
I bought another one of these after 10 months of use.  Still getting the dL error and repeated clicking sound.  This one cost ~20% more than a yr ago, so hopefully the new cost comes with longer durability.  As with the first one, it clipped in very easily, and once resetting the washer by unplugging the cord, the dL cleared and the door lock clicked shut.  It is the most affordable replacement part out there, but the length that it works is in question.  Have to agree with others that it's just a part, in bubble wrap, in a box.  If packaging matters, this is not for you.  Please work longer this time.  Still cheaper that replacing the whole washer.

8/20/16 update, bought this part again

Now it appears that genuine parts are made in Korea, hopefully South.  This one is two-tone, and lacks the plastic part/wire hanger and lock pull as the part it replaces.  Replaced the part, and the door lock error did not clear.  Thought I had a defective part.  Watched a few videos, and one repair vid said that often the master control box terminals get oxidized and lose their connection.  If you dis/reconnect these plugs on the MC box, especially the 3 plugs that go to door lock, this re-establishes a good connection.  I went the extra step and added a little dielectric grease to each connector.  Plugged the washer back in and this cleared the door error.  Also used what I thought was a bad lock, and it works, too.  Didn't need a replacement lock after all.  Taking the top off is easy, just 3 machine screws, to get to the MC box.  Took longer to shimmy the washer from under the cabinet.  If you can replace this switch, you are handy enough to pull the connectors on the MC box.  Good luck!