Product review (5 stars): Work just fine
Bought the black ones and they match stove top fine (not perfect, but good enough).  Our gap was relatively small and these do a great job of covering the gap. We've had installed for 2 weeks with no issues, no sliding or falling.  Looks much better than the gap did and eliminates food falling down between stove and cabinets.  Would be better if they were a bit longer, we have about a 1/2 inch at the back that this doesn't cover (past where food would fall in - but it would be nice to have them extend to the backsplash for uniformity).  Great for a narrower gap. If your gap is super narrow, these may not have enough room to slide in.  The back side on one side of ours is tight and we had to force it in (but we don't have to worry about it sliding).