if it had a star then it would rely on a star to maintain it. look at the list of long running musicals - no stars. star casting is dangerous for a musical. i also think it degrades the piece - let the show be the star.
I went last week - got the cheapest seats at the back of the circle - i must admit i was a little worried - but the prince of wales is such a good theatre. i had no complaints about my view. even at the back its such an intimate theatre and there isnt a restricted view in the house. i actually think those seats are the best value. you can pay the same price for other musicals and sit in the heavens with a strained neck.
as for the show....wow. boy does it live up to the hype. i've just booked again for august in the same seats.