This rating is second-hand since our daughters actually attended the attraction. They said it was pretty awesome. I thought the tickets were a little steep ($24 child and $39 adult) but it is Vegas. The attraction itself last about 45 to 60 minutes depending on how long you take to look at the exhibits. I am not sure if it will be that great for little kids (below 5 YO) since lots of the exhibits has to do with data and background info. You kind of have to be a superhero geek to really enjoy it.