I saw white 197 with those stickers on it in Coventry once, I actually laughed out loud.
It wasn't that they looked bad in themselves, it just looked so out of place waiting at the lights with all the other normal cars around it,
he was getting alot of looks, but they were more 'WFT do you look like' more than 'OMG look at that race car'.
I'd give them a miss if I was you, on a track day car YES, on a daily commute/grocery getter NO!!!