I went here for dinner during my trip last year. I'm usually not one to complain about food, even if it is less than par. However, this was the first time in my life (and a first for my friend also) that I had to send my steak back to the kitchen. We both ordered our steaks medium, and it came out rare..almost raw. Our server was not sympathetic towards our concern, and simply went through the motion of taking the plates back and forth from the kitchen. The second time around, the steaks were so rubbery i took maybe 2 bites before looking at my friend and saying "I give up". We both just ate the side mashed potatoes that came along with the dish, and left everything else there.
We made comment to our waitress that our meal was not good, and still she shrugged off and brought us our bill. No attempt was made to reconcile our bad experience.
If you're looking for bad service and unedible food, make sure you stop by McFailure at the Rio.