This was an awesome experience and a great way to view the city! Like others, we had a Groupon deal that was well worth the money. I don't think we would have been as happy if we paid full-price. We chose the "Happy Hour" special and had an 8pm reservation. While it was fun, we did have quite a few people in our "pod" (20). Regardless, you were able to get about 2 drinks a person.
It should be noted that, if you purchase a Groupon, you will need to make a reservation in person the day you want to redeem the coupon. I wish we would have known this...