Build quality seems good so far. Pretty standard case design, looks identical to a factory nav unit you would install in dash, with the exception that it also has a USB dongle connector on the back.

The screen seems pretty high quality, and should be readable in bright daylight inside the car. Might not be a good convertible car screen though, since it isn't fully transflective. Native resolution is 800x480, though it will scale and allow 1024x768.

I don't think the screen detaches, looks to be screwed down to the case.