We bought this unit with great skepticism. To vary the reviews were here on Amazon. We risked it and they did not disappoint fortunately. Device loaded. Upside Level 3 for cats and our cats have not set foot in the garden of our neighbors. They avoid even deliberately now the area where the device is. For us the perfect device. Solar powered. Waterproof and keeps its promises. One thing I would like but still say: For small areas, the device is useless, because it triggers itself relatively quickly at the lowest level.