Mark,
It's a logo. It isn't meant to say what we do, it's the who we are bit.
If your van isn't sign written you're doing yourself out of business. I've lost count of how many people say we saw your van and rung you. They also think the van looks very professional, which in my opinion it does. Only the other day someone said, 'gosh, your van looks impressive,' and that's mission accomplished as far as I am concerned.
Simon