Something you have to experience at least once! I think the ticket prices for the show makes this a 4 star experience instead of a 5 star experience, but there are plenty of groups on the strip that sell discounted tickets to the show.
The music and presentation of this show was phenomenal. Also, if you just feel like having clothes to wash later, you can sit in the first 5 rows, with provided ponchos on, and allow the Blue Man Group to pound away on their drums and other props, and splash various things on you, which includes washable paint.
As I said, everyone should do this at least one time. I am sure you will not be disappointed.