Before using broiler, completely remove stove knob covers. This product is only a deterrent. It is not a substitute for proper adult supervision. Discontinue use when child becomes old enough to defeat it.
The product concept is great, and the covers are constructed well. Installation was easy, and the covers seemed secure around the knobs. However, as soon as I opened my over door for the first time, the cover (which drops down slightly once installed) flew off completely with the knob still inside, and fell inside the hot oven. I was able to get it out before it melted, but I would think about how close the knobs are to the oven door before purchasing this product. It did not work for us.
Bottom Line No, I would not recommend this to a friend
The knob guards work wonderfully. My 21 month old loves pushing buttons and turning knobs and these really help to deter him from the knobs on the stove. He has finally realized that they are not "fun" since he can't get to them and has completely left them alone. I love these things!