This place used to have cheaper $3 washes that spoiled me. Now the cheapest one is $6, which I agree is still a deal, but still..
For $6, your car goes through the drive-through car wash we've all used, then some kids dry (though not very well) the car for you, then you get to park it in a little spot where you can use their vacuums to further clean out your car. I like the vacuums more than I like their car wash, and I especially love the machine that takes in your floor mats and cleans them pretty good.
They also allow you to upgrade your wash up in $2 increments. It allows you to add things like Rain X protectant and such to your wash, though the effects of that upgrade seem to be nil. Don't do it. I like to pay the $6 for the wash, then go home and really clean my rims and such a little better.