I don't know what the problem is with this particular Sonic, but it is the worst I have ever encountered. The service here is always super slow. One night we waited almost 30 minutes. I vowed not to go back, but the other night I really wanted a milkshake and this was the closest place. It was supposed to be half price after 8, but I was charged more. I even asked because I thought it sounded high, and they assured me it was half price. Not worth my time to deal with them to get the money back. I just won't go back ever again.