Product review (4 stars): Good replacement parts at a good price.
This is not the first time I replaced the igniters in my Viking stove but the first time I did it right.  Even though only one igniter was burnt out, I replaced both.  A guy who does appliance repair full time told me that replacing only on igniter puts an unbalanced load on them and causes the other to burn out quickly.  I was chasing back and forth for years.  Now they glow evenly and last far longer.
The attractive price of these units made replacing both more affordable.