right... you asked what people think.. so my honest opinion is
i don't like them
reasons:
the font of the digits looks difficult to read
the background contrast doesn't appear to be strong enough
they don't look to be accurate or provide enough markings
however... that said, I will always applaud people who have the balls to try something new and see how it goes and to post it up on the internet, so well done you and if you like them then keep them... its your car after all and you can do what the hell you like with it as long as you keep mr MOT man happy!