Had at first but a bit concerned about the whole Kabelverlegerei. Furthermore, I have a very complicated garden with many corners, trees and shrubs, as well as some hills. The lawn is very wavy. But still everything worked right away and it's really fun to watch the device. The guide was also very detailed, continue there is a video on. All in all top device. A tip to use in uneven lawns, rather than more soil nails every 75 cm. Have installed a total of 600 pieces. 400 are.