You can see the screen if you are sitting in traffic! I found out that the screen was mounted on a pivot, but I never bothered to adjust it. I adjusted the brightness/contrast of the LCD to get a better view.
When the car was in 5th gear, the screen was 60% obscured but it was for SatNav and I used the voice prompts so it wasn't really an issue.
The reason for mounting the screen behind the cupholders was for stealth. Most mini2ers never realised I had SatNav because the screen surround was black and the screen in off-mode was also black.