If you are 16-20 years old you may rate 5 stars. As a parent reviewing attractions for other parents I only give it 2 & a half. This is because the rollercoaster rides are decent. 30 bucks takes you to every attraction under the dome. Per person. For a day. While it takes about as many hours as stars I rated it for, to ride everything twice.
The crowd is motley and reminds me that all those 1990's lowriders used to stop at Circus Circus after their LV Strip cruise. It looks like they traded their lowriders for Astro mini-vans and are still coming here w/their identical offspring. It seems as though their progeny were all hired here too. Lame staff.
But hey? There aren't any other amusement parks in Vegas. So there is no competitive push to update this place. Like I said the rollercoasters are decent. Wait till your kids are in Middle school at least.