I'd give the Adult's Only tour a solid 3.5 stars. The ride is nice and takes you to see all the major sights, but it IS expensive and the check-in process is really confusing - the ticket directions didn't match what we actually did. Also getting a free drink is nice, but in order to get your free drink, you have sign up for a membership card with the casino. Not a huge deal, but really? Come on. And lastly, the guy who checked us in (the driver) came off as a little rude, but the guide was nice.