Our purchase was at Bill's Casino. The folks there were great but beware of the following:
1 -- Wyndam Resorts is a catch-this-sucker breath away from the Tix booth. They will try to rope you into free shows w/timeshare sales talks.
2 -- The "retail" price of a ticket may be misquoted. This was true of the Harrah's Flavors Buffet -- don't buy this -- awful buffet not worth the ACTUAL discount.
3 -- Know what you want ahead of time.
4 -- You may get coupons for a show and then be required to exchange them for tickets at the show box office. If so, ensure that you get seats that are to your liking.
5 -- Buying tickets this way may require you to go to an inconvenient location and stand in line for an inconvenient amount of time.
We were surprised at the number of shows that were discounted. Even Phantom and Ka showed up on the list. So, if you want to save some real bucks, check out the actual cost of tickets ahead of time and know what you are willing to pay.