Me and my sweetie got two races each with a Groupon deal. It was a good price. We had fun while racing but there were thing that made the experience not very pleasant. They switched cars my sweetie was in because they couldn't be bothered to move all the cars to allow his assigned car out. So on the print our of lap times it didn't say his name - just "*unknown*". Not too big a deal but we're trying to save everything from our vacation so to us it was a let down. The guys weren't paying top much attention so if you spun out - you were stuck for a while. They weren't too pleasant or helpful. The girl at the front desk was super nice.
The cars were fast - that's for sure but its a very short and turny course. Nowhere to really let it rip. The seatbelts in the cars SUCKED. They help across above you're lap. Not even touching you. So if you went fast you were slammed back and forth in the car. Our back are very bruised after going two laps.
The bottom line is its kind of fun. Depending what you're looking for it may be worth the negatives.