Product review (3 stars): Didn't work for me.
I got this for the crack between the stove and the counter. In our kitchen there is no counter on the other side of the stove, so there was some flexibility in terms of how big the crack was. It stayed in place to an extent, but slid around a lot when it was being cleaned (often at our house - there are five kids and the ten year old is a budding chef). Also, because of where the gas line to the stove was, the stove, and the Kleen Seam, was pushed forward from the wall (compared to the counter) and didn't provide a great fit.

Ultimately, I moved the stove over so that there is now a 4-5 inch gap between the side of the cabinets and the stove, and the stove can sit back against the wall since the gas line is now to the side. When drips and food fall down there, it is much easier to clean, and the Kleen Seam now lives in the laundry room behind the hampers.

This would probably work best in a situation where the stove was flush against the back wall and surrounded by cabinets, in a home with older kids or adults. I found that something that wasn't attached just made more mess in the end for us. It's a good idea, but the problem may be a bigger one than this little guy can solve.