I was lucky enough to see this production last night and I have to say it is the most emotion provoking theatre production I have ever seen.
The production is only running for 6 weeks, coming from Broadway.
I would strongly suggest you to go and see this production, I visit the theatre about twice a month and have seen all of the West End shows, but this contends with them.
Lastly, the cast involved are all leaders in their field, so if you need an evening out, see this production. :)