Product review (5 stars): This may be my best purchase ever.
I am so happy I bought this.  My oven has the ability to use it but I've never used it - not sure if I ever got one when I purchased my oven 2 years go.  The GE replace is over $100 and I couldn't imagine it would be worth especially since the reviews said it needed to be replaced every few months to couple of years - not because of any design flaws but because of the nature of the product.  I found this and since Amazon could not confirm it would fit my oven properly, I did a test run the weekend before Thanksgiving.  It was 100% accurate and worked like a charm.  I used it in my convection oven on Thanksgiving and my turkey was juicy on the inside and crispy on the outside and I never opened the oven once which is a huge deal for me.  I always have 25 - 30 people for each holiday dinner so I'm extremely busy and to be able to not worry about the main course is amazing!  I can replace the 5 times for the cost of the name brand and because it is so in expensive, I can order a back up so when it does eventually fail, I will still have one on hand.