Is your car dirty? These guys will wash it for a fair price.
I've gotten special #1 before and special #3. I can't tell the difference and still noticed things they missed after getting the special #3. Stick with special #1.
It's not going to be perfect. They'll get the dirt off, it'll look shiny and clean for the most part, but if you pay very close attention to detail, you'll see that there is none. There are water spots left over, some cleaner left in crevices, etc...
Bottom line, it's a basic wash for a basic price.