Product review (4 stars): Works beautifully. Ends are slightly shorter than original
Although this item was not listed as a direct replacement for a JennAir 27" wall oven, I decided to give it a try because Whirlpool produces JennAir products.  It was ~1/4 the price of OEM version!

Works beautifully.  Ends are slightly shorter than original, but they get held by bracket. (Oven door must be removed to get at bracket screw.) Clips match oven holes perfectly.