Product review (4 stars): Super easy to replace
Only giving it a 4 star because the first one they sent me was broken.  They responded fast though (I emailed then directly) and I was refunded within a few days and then reordered.  I have an older Viking 4 burner stove/oven.  For several years 2 of the burners would continue clicking even after they lit.  I tried re-grounding, cleaning the spark ignitors(?), nothing worked.  Thought for $50 this was a cheap option vs a $400 repair bill.  Take apart the top of your stove and the spark module is located under the center tray (the thing with all the wires routed to it).  Super easy to replace.  Be sure to mark your wires before taking apart.  Problem solved!