Product review (5 stars): Exactly what I was looking for!
3 month update:
I have the name brand silicone covers also and when I moved, I left those behind and took these with me.  I like these so much better.  They are more flexible and easier to clean.  The silicone is easier to wipe down.  My mom just got a new stove and as soon as she told me there was a gap, this is the exact product I recommended to her.

I have the most hideous gap between my stove and the counter.  The installer broke and chipped my counter to get the oven to fit so now it's all jagged and just terrible looking.  These Silicone covers do just the trick.  They fall right into place and are a little bit longer than the ones that I currently have on my stove which makes them the perfect length.  I haven't had any issues with them staining or moving around too much.  They are super easy to clean, just wipe them down (you don't even have to remove them).  If you do want to get up under them to clean, they easily come off for cleaning.  Unlike others here on Amazon, with these, you get TWO in this set.

*I received a sample of the Tranquilly Silicone Stove Counter Gap Covers at a discounted price in exchange for my honest review. I was neither paid nor sponsored for my opinions and all thoughts reflected in this review are solely my own. I am disclosing this in accordance with the Federal Trade Commissions 16 CFR, Part 255: Guides Concerning the Use of Endorsements and Testimonials in Advertising