I found a groupon and paid $30 for $50 credit. Tax and gratuity expressly not included. I went on a Wednesday night and service was not a problem. Ultimately we both had the white chocolate bun hamburger with french fries and 2 margaritas. The toatal bill after tip was closer to $70, so after the $30 groupon we still needed to pay the additional $20.
The hamburger was very good. I did not notice a white chocolate taste. Although the french fries were a little over done they were still good. I found that all meals in Vegas are very, very expensive, so I guess $50 total wasn't so bad. If I had to pay the full $70 my rating would have been 2 stars.