Bought mine yesterday. There is a lot of interesting stuff on Morrissey's 1990's output because a lot of the musicians have provided new interviews. Andrew Paresi is splendid; really articulate and informative plus loads of good stuff from Johnny Bridgwood. Think there are also new comments from Steven Street and Mark Nevin. Great to hear a huge appreciation (by Rogan himself) of, among other under-rated songs, the magnificent This Is Not Your Country.
The analysis of the ROTT songs is pretty weak. Get the feeling that Rogan doesn't know a lot about music and really relies on the musicians to provide this element which Morrissey's current band obviously wouldn't do.
Haven't bothered looking at The Smiths stuff. That's all been covered in Goddard's book.
So all in all probably worth getting. It's an enormous book though which is a pain if you live in a tiny flat like me!
Maurice