Agreed. We have three (3) 3-cam setups in 3 different vehicles with 3 different memory cards running on Viofo's hardwire kit. Initially, they all worked fine. Then they started to have random freezes, wifi problems, etc. One of them still mostly works. Two of them are no longer discoverable on wifi, so we can't adjust settings. One of them can't even be powered off via the buttons on the unit - and that's actually the replacement unit Viofo sent us. We have tried new memory cards, swapping to the 12v socket adapter, unplugging all but the main cam, old firmware, new firmware, etc. These things are just straight up garbage and I would never buy another.