We just bought (Actually managment just shoved down our throat) 2 new vehicles, and they have yet to be marked. We have 8 vehicles (6 cruisers, 2 vans), all marked, or soon to be.
Have had more problems with access and people even believing I'm from the news without the logo on the door.
Our newer vehicles have a smaller logo on the door and one on the upper left of the tailgate. Probably about 30 inches by 20 inches, real subtle.
We do take our vehicles home, and my GF hates riding in the marked vehicle. I would like to to see us get all-white magnets to cover the logo when we take them home, or when we need some discretion.
The new vehicles are getting logos today, but I have always liked the idea of magnet logos to be able to take them off when we don't need to advertise. (And for our talent when they have to drive thier own vehicles) We just had a unit involved in a major accident, and it would have been nice to get rid of the billboard on the side. (Thank goodness we have a good relationship with our competition, and they covered the wreck without mentioning we were involved.)