There are a lot of reviews for this business on tripadvisor.com.
My boyfriend and I bought a Groupon for $85 for two people and went on Sunday over Labor Day weekend. Compared to other club crawl/tours we found, the price couldn't be beat. Other tours offer good deals, but not on holiday weekends. We had such a great time! We started at MIX at Mandalay Bay, then headed to The Foundation Room (also at Mandaly Bay). We spent two hours at Foundation Room (a bit too long, since this is more of a mellow lounge than a club - I think one hour would have been plenty of time). Then we headed to Body English at The Hard Rock. We stayed there for about an hour, which didn't feel like much time at all. Lastly, we went to Pure at Caesar's Palace and danced until about 4 a.m. when they closed. The party bus that took us from place to place was pretty fun. Free drinks (super strong) were provided on the party bus, but they tasted like they were made with the cheapest of cheap liquor. Over all, it was super fun. Vanessa was a great hostess and everyone seemed to have a great time.
The reason I give it 4 stars rather than 5 are 1) the timing seemed a little awkward and I would have rather spent more time at the more lively clubs that we went to after The Foundation Room. 2) communication in the ticket purchasing/booking process was not very professional and I felt like I may have been getting scammed. 3) the cheap liquor. 4) it would have been nice to have spent more time on the party bus.
But I feel like the value for the money we paid was unbeatable. I'd do it again.