My wife and myself did not feel like the tour lived up to the reviews on yelp. I have never done a food tour before so I did not know what to expect. It felt more like a sales pitch for Harrah's properties. The samples of food are tasty and the introductions by each restaurant's manager is nice.
Tickets are $59 on their web site. If you decide to try it out I would suggest getting it on a deal site such as travelzoo or LivingSocial when they have a promo code for an additional discount. You do need to book far ahead in advance as their tours sell out pretty quickly.
The tour is ok, personally I would not do one again.