Product review (5 stars): Fixed my own range!
After burning a few batches of pancakes I finally figured out that my rear burner was either off or all-the-way-on.  I wasn't too thrilled about the prospect of replacing my newish Kenmore range but also figured I was out of my league for repairs.  I had replaced elements before but in this case they were obviously working fine (too well).

Rather than fork over $300 for a repairman, I went to the internet to diagnose my problem.  Within a few minutes I had narrowed it down to the infinite switch - part arrived two days later via Amazon Prime and took me all of twenty minutes to replace.  Thanks Interwebs!!!