I like it a lot, it works well indeed and it is is very clever system. Reproach is that it tends to slip on my floor (I tried double side tape but does not last long), and only in black or grey (brown woudl be great). suggestion: makse several little ones that we could link with one another to circle around the litterbox when Kittycat can escape from different angles :-).. My tiny one does not like it and jumps accross a corner, the big one does not care and steps on it (hurray!!)