Product review (4 stars): Really Effective.....But Too Short..Gets Dirty
I decided to order two of these rack guards after burning my arm for the umpteenth time.  Although a klutz like me can manage to burn himself just about anywhere, its definitely the forearm that gets exposed to the searing hot front of the oven rack most often.  If you're someone that uses the oven a lot, you know what I am talking about.  (Even if you use one only occasionally, you still probably know what I am talking about).  These thick, easy to install silicone based rack guards stay reasonably cool even in the hottest ovens.  Cool enough that you can touch them and rub your vulnerable forearm against them without ever having to be worried about being burned again and saying a whole lot of naughty words.  There is no question about there effectiveness, nor there durability either.  The down side to these, (and all the ones available on Amazon it seems) is that they are all too short.  They are designed to cover just the middle of the rack figuring that's where most of us will encounter the hot spot. Although that's mostly true, my experience with them is that in the process of sliding the racks in and out you can easily rub your arm or hand against any part of the rack and get burned.  Yet all of them seem to be cut off at a certain point in protecting only what appears in the picture. Frustrating. (If you really want to cover the entire rack, you can order two sets and cut to size without a problem). Also, these strips are not any more resistant to stains and spills than anything else in your oven.  They get dirty over time and are not easy to clean.  Like the walls of your oven, after a while a lot of scrubbing on your part only produces passable results at best.  All stains seem to get baked in as we all know and hate.  Despite these flaws, I still recommend these JAZ guards. I have owned in the past the cheaper blue style strips also available on Amazon and they do not work at all in comparison to these. These ones do work, and well.  They are reasonably priced here on Amazon, and near impossible to find in stores...