Here are some links to more information on the BlackVue.
http://www.blackvue.co.kr/en/contents/sub1.asp?idx=7
http://www.blackvuehd.co.uk/BlackVue_DR400G_HD.php
http://www.mp3car.com/mp3car-blog-ta...ng-device.html
http://www.radardetectorforum.org/ca...review-42.html
This should give you more detail on the product. The GB is with TTW Partners Limited - the authorized reseller of BlackVue in the UK. The website I've linked above is their website.
I've only heard good things about the BlackVue DR400. I've seen it in action and I was very impressed. The Android app is a nice touch for any android users, I'm an iphone user though!
I haven't actually got one myself yet but I'll be part of the GB if we get enough numbers to run the GB. I've seen it in action and was very impressed with it.
Pricewise I think the rates being offered are decent, especially the 50 GB price, although getting 50 may be a bit unrealistic. The camera is pricey in comparison to some of the other options on the market. There are various other GB's running on E90post in different countries.
Personally I'm willing to pay a bit of a premium to have something that won't let me down and the unit itself actually looks decent enough so I won't mind having it on the window.