Saw Jersey Boys 2 years ago at Paris - Loved it.
My tip if you are thinking about seeing a show - don't buy tickets in advance as there are "same day discount ticket" kiosks on the strip. We were able to get our tickets for Jersey Boys discounted, and then for another $3/each we got the buffet. We saved 30% off our tickets - the discounts range from 20% - 50% off depending on the show and availability.
There are also % off discount tickets for some of the nicer resturants, for example a $3 ticket might get you 20% off a bill at a 'nicer resturant'. If you know you are going to that particular place to eat, you can save a good chunk of $.