A Casino is a Casino!
I am not big gambling fan, so I can't compare that aspect of Red Rock Casino with other casinos; however, I do like the look of the place. I have stayed there only once and for a few nice and my stay was very pleasant. As for food, I must say the buffet used to be of much higher quality and cheaper only a couple of years ago. Things have changed since, and not for the better. You may want to avoid Friday, Saturday and Sunday nights if you plan to eat at the buffet. It is very crowded and the quality of the food is not as good.
I love the location though. It is 15 minutes from Red Rock Canyon National Preserve and right next to Downtown Summerlin. So whether you enjoy hiking in a national park or shopping center, you can have your pick.