I saw Matilda in the theatre in the West End - inventively staged and well performed. Personally I, and several others in our party, thought it was brilliant; opinion was quite sharply divided, mind, with some people quite unimpressed. I'd say it helps to have a slightly child-like mindset - if you like Dahl's stories, you're likely to enjoy the musical. I can't say that I feel the musical numbers are perhaps quite good enough to make any of them timeless classics - but like much of Tim Minchin's work, they're still clever (very clever, in a couple of cases) and catchy. As for the CD itself, that seemss technically fine; no problems I noticed. If you've seen Matilda on stage and enjoyed it there, you'll enjoy the CD. If not...I have no idea.