The Mrs and I have seen them about 4 times now.
They're really good.
If you're in 'Vegas anytime soon you ought to see 'em.
Just don't sit in the front row OR in the seats on the end of the first 3-4 rows unless you don't mind being part of the show!
('Only "complaint" I have is their AUDIO IS SET A BIT HIGHER (read that - hold your ears) than it really needs to be IMHO. ;-) )