At first I was skeptical, but after using this for a year, I'm sold.  We spread this on the ground to cover plants or areas we don't want varmints, whether deer, rabbits, chipmunks, etc.  It is thin so it is not readily seen via eyesight, so it's not visible from the road when people drive by.  Deer step it in once, and that's all it takes.  All the other animals in our area (very rural) have learned to avoid  this stuff because it sticks to your feet, just like it does to the animals.  We put this down again this spring, and it stops all animal traffic into the yard. Last fall, we were cleaning off the old leaves before winter and we even had a blue racer (snake) that was caught in it.. (it couldn't get out), but we were able to free the snake by cutting it off (very carefully).  Snake rested for quite a while on the ground after being freed, but soon left.  This is great stuff, we also use it to cover potted plants left outside, and the plants are not bothered by any of our wildlife.  I'm guessing the people who don't rate this high just don't know how to spread this out for maximum efficiency.