We had quite a few of these parts. Up to this device all have virtually nothing causes and were always after a short time broken (usually damage by UV light followed by flooding when it rains). This X4 holds already the 2nd year and still works. The unit is built much more robust than any other before. The gasket in the lid is still ok and the cover still shows no signs of damage caused by the UV light. - That's our experience unfortunately far too rare. In the 1st year, our burrowing Customers can still impress. Not so this year. The Vole (or majority ??) appears not impressed and was last distance to this rattle-thing raised a wonderful gentle hills even in 30 cm. I'll probably think of something else ... may now :-(
Conclusion: Among the many wicked clearly the best, the effect seems to depend on the very psyche of the vole.
