This case is really the best thing that could happen to us. We had tried all kinds of things (gas, any bait, garlic, imperial crown ...) which could all be forgotten. We have the case as used as it is in the description and that's really very simple! And lo and behold, even one night later we had success. So far we have already captured six voles. At the moment is calm. One of our neighbors has also this case, and would just as we recommend to anyone who has a problem with Wühlmausen.