The rooms at Circus Circus are, without a question, by a large margin, the most disgusting hotel rooms I have ever stayed in. I don't expect luxury, but I also don't expect the room to smell like spoiled food. I asked for a room change and the second room smelled better but when I checked the mattress for bed bugs, I found Skittles, Goldfish crackers, hairs of various types, and sticky stains.
I've stayed in my fair share of Travelodges and Comfort Inns and this dump is not even up to their standards.
I'm awarding a second star just for the old arcade games, and because the video poker and table games have better odds and lower minimums than most on the strip. The reason for that is it's the only way they can operate without bulldozing this charmless monstrosity.
Play once and expect an offer for a free room to show up in your mailbox. Don't take the bait. You'd be better off sleeping in your car in their parking lot.