I have the BlackVue DR500GW-HD in all four of my cars. They will do a lot like sound recording and recording while parked but I have everything turned off except the record while the car is on function. They have GPS, show speed, date & time and map your location. I also put one in my son's car and my daughter's car. I hardwired most but tapped into the fuse box on my wife's Mini Cooper.
With the exception of having a 16 GB mini card going bad I have had no issues. They are small and fit tight at the top of the windshield.
They have several models out now and it can become overwhelming when you start shopping. And, like anything else, opinions abound. The last one I bought was $230 on Amazon.
http://www.amazon.com/BlackVue-Wi-Fi...s=Dr500gw%3Dhd
