I've been to sonic twice in vacaville and both times there has been some kind of problem. First it was they were out of ice cream at 6pm. And the second time they only had 1 car hop and she couldn't handle it. They would only take orders at the drive thru which was insanely long. The lady who informed us we couldn't order waited 10 minutes of us sitting there to let us know. She was rude and unprofessional about it.