I'm not much of a show tunes person, so take that into consideration.
My wife loved this show. She danced for a number of years when she was younger and totally got into the show. I thought it was Good. The singers/dancers and band did a great job and were very talented. The Steve Wynn voiceovers were a little odd. Not sure why that couldn't have been done live by one of the performers.
Again, just not my style of show. If it had an explosion or two and Jimmy Page playing a set, I would have been more into it.