Used a Groupon here for two yard sized drinks. No problems redeeming the deal, but we were charged for tax.
The SERVICE was actually VERY GOOD - the cashier we had was extremely friendly and offered us the opportunity to try all the samples before deciding on what flavor we wanted.
The DRINKS, however, were NOT VERY GOOD; they were not strong at all, and after drinking it for a while it either got too sweet (strawberry) or too sour (happy ending), to the point where we felt sick drinking it.
I would not be back again, even with another deal.