These boundary markers work well with my robot hoover (Shark brand). The strips are easy to cut to the length you need and we have combined several shorter strips to create a longer barrier if required. The strips work as expected. My vacuum lands an inch from the mark before flipping over. (However, you need to make sure there aren't any light objects nearby that the vacuum could push or move the strip into. This will break the barrier you were trying to put up nearby.) Will definitely be buying these strips again . It is by isolating spaces that we get the best results from our robot vacuum cleaner.