Use your money and go to a real restaurant. The deal is not that great for so-so quality food. We had a 2 for 1 voucher that made it kind of worth it. Fruit was great. Rest was just OK. Server was actually polite.
There were loud, obnoxious people around us, but you can expect this at practically any buffet in Vegas. If you're into buffets, probably the Wynn would be your best bet.