The only reason why Circus Circus stayed was they had a major expansion done in the 1990’s and are planning even more expansion in the future.
I have been to the Circus Circus plenty of times to take the kids to the Adventuredome. I thought it was dirty although the room rates reflect that.
Circus Circus I think is the ghetto casino.
Dirty, the people mostly running around there look like good sources for future riots and it smells.
Outside of that, enjoy!
At a bare minimum go to a Luxor which is a better low cost place.