It meets at the beginning of its purpose and has enabled us to start again in the morning to sleep longer. Unfortunately, our Kitty's figured out how to do this part harmless over time, namely sneak from behind umschmeißen. I also got my Katerle already observed this as it stands in the beam and zero response shows. As if he had become accustomed. The box runs out quickly, perhaps because you reintappt from time to himself. Nevertheless, 4 stars, this product can indeed help it that my cats are those oxen ;-)