I bought the Groupon for three supreme car washes. I've already used two of them. My second experience was MUCH better than my first. I waited in a long line to pay on my first visit and the cashier was a snappy bit**.
The second visit went much better and my car windows were completely streak free. I even bought an insulated refill mug from the attached Dunkin' Donuts. As mentioned in many of the reviews, the guy who took my car when I pulled up both times started to upsell me, but stopped when I said I wasn't interested.
Both times my antenna was inside my car and not reattached. Is that the norm?
I have until July to use the third and final Groupon, but I'll probably use it before then. I wish there was a Cobblestone closer to me than this one. I have to drive 16 miles one way to get there. Because of the distance, I won't buy this deal again. There's a Danny's just down the road from me so I will go there.