I think they look good, as for the amount of unwanted attention you'll get, I think its more down to the type of car you drive.
I’ve always had illegal plates of some description, either letters to small or incorrectly placed.
When owning a boy racer Mondeo and a couple of MR2 I used to get pulled all the time for it. Lately its not been a problem in more "expensive" "upper class" cars. For example I didn’t even have a number plate on the front of my Corvette C5 plus the rear number plate had illegal spacing and incorrect letters sizes and I didn’t get pulled over once in a whole year.
As for a CTR, I think if a local Bobbie is having a bad day, he will pull and fine you.