I have the newer Blackvue DR500GW-HD with Wifi.
This is probably one of the best ones on the market.
I also have one for sale since my wife didn't want the one I bought for her.
http://www.e90post.com/forums/showthread.php?t=808554
Let me know if you have any specific questions I've had mine for a few weeks, there are lots of reviews online if you google it.