To begin, this litter mat definitely catches A LOT.  However, due to the size of our litter box (it's self-cleaning), there were still a lot of granules that ended up on our floor.  With that said, I'd definitely give it more stars if we could pick a bigger size mat.  Also, our cats like to use the mat as a scratching post, so some of what was on our floor were actually small pieces of the mat.  

Overall, I would still recommend this mat, especially if you have a covered box (ours isn't) and/or a smaller pan.