I stopped by for the first time recently and tried to use their Yelp offer. I wasn't able to, though, because their point-of-sale machine wasn't working. But rather than turning me away or making me wait, they gave me the wash I was planning to purchase for free!
I could have used a pre-wash area because I still had some grime on my front fender after the wash, but I overlooked it for the quality of service.