Product review (5 stars): I repair appliances for a living and find often times the problem is a bad relay on the control board
All reviewers that posted negatively, most likely don't know how to diagnose a stove that isn't keeping temps correctly, nor checked the suspected faulty probe for proper resistance (an electrical measurement, ohm's, checked with a multi-meter @ various temperaturess).  A temperature probe HAS TO BE CHECKED FOR OHMS OF RESISTANCE THROUGH VARIOUS TEMPERATURES, to properly diagnose if it actually is faulty.
I repair appliances for a living and find often times the problem is a bad relay on the control board.  Don't get me wrong, temperature probes can go bad.  But too many people run to unreliable internet video sources and think they are solving their problem with a quick, inexpensive fix that quickly disappoints them. Just saying.
Maybe it's just better at times to hire a professional appliantologist!