I know people find it hard to believe, but THE Steakhouse at Circus Circus is a winner. One of my very favorite places to go for steaks anywhere.
Assuming the person is asking specifically about CET properties due to a comp situation, then I can recommend both Prime Cut at Flamingo and Ruth's Chris at Harrah's, but I would give Ruth's Chris my first vote. I know it's a chain, but they are consistently excellent wherever I've tried them, and the one at Harrah's is one of the best of many I've tried.