My mate's got an F770 in his car. He loves the quality, but it's a big bugger isn't it ? Helps that it doesn't have a screen and can sort of lie flat. He did tell me that the app he has to go with it seriously needs updating for the 21st century, and looks very dated, but he said he can't deny the quality. It's certainly one to add to the list.
For you other guys with the models with screens (most of the Nextbase ones), can you confirm that you can set the screen to be permanently off or is it on all the time (think that would be a distraction ?