We have the ampfibian and mum and dad have been using it while they're staying with us. Their van is 2 years old and our house is 1.5 years old so all wiring is new. There have been a number of times where their van has activated the ampfibian safety switch and not their vans (usually wgen running the toaster, kettle and microwave at the same time). For our families safety we are very greatful for the protection