I have to admit that I had no interest in seeing this, but the people I was traveling with did. I enjoyed it quite a bit, although the biggest positive for me was seeing a really well-designed old-time elaborate set and a large cast, not the reasons to attend the show of course.
Having seen the movie, I am not sure this had any reason to exist . Given its cast size, I doubt it will have a large afterlife, and it was IMO not as good as the movie. I thought that George Clooney gave a solid performance and brought the appropriate gravitas to the role; however, I was surprised that his big scene was not done fully live. The intercutting of the live performance with the pre-taped made me wonder whether he was afraid to go all in.
The audience seemed to feel that it got its money's worth. I only paid $99 and, though clearly way on the side, it was not really a bad seat for the particular show. I didn't feel that i missed anything being on the side and I never would have paid even $200 (the cost of the seat right next to mine), so I am happy.