Product review (3 stars): Worked great after a few modifications!  Basically, just a spark plug - why so expensive!
I had to modify the ignitor a little bit.  The metal pieces were too close together, so I bent them apart just a little to get a better spark.  Also, the metal piece was angled too much and was grounding with the burner pipe.  After the minor modifications, it works great!  Although, because it was not working on initial install, I ended up taking a lot of the grill apart to diagnoses what the issue was.  It should have worked upon initial install.  I did not have any problems last time I installed an igniter.  Also, why are these things so expensive????  Sometimes, I am not sure having a Viking grill has any real benefit.