I was also there and had the opposite reaction. I also had seen it in London, where I thought it was fun, but couldn't sustain its plot for two acts. The only issue to me now is that what had been the Act 1 finale still plays like an Act 1 finale. Otherwise, in the best possible sense, I thought an American cast made it (in George Abbott's adage), louder, faster, funnier. It was no messier than any other 29-hour reading I've been to, and the cast was quite accomplished and seemed surprisingly comfortable to me. Particularly enjoyed Bonnie Milligan, Natalie Joy Johnson and Ann Harada, but all were strong. They only did a Minnesota accent for the dad.