DO GET IT! It is amazing and provides such a great tribute to Classic Who. All 8 Doctors! Leela! Nyssa! Peri! Ace! Charley! And the Master! Plus the Limited Edition has two behind the scenes features, one for the story itself and another on Big Finish's work on Doctor Who, and there's a bonus Companion Chronicle for the First Doctor with Ian and Barbara.
And Nick Briggs' kid is in it. Nuff said.
I kinda wish at least that some more of the New Series Companions could have appeared - I mean if UNIT is appearing surely Martha and Mickey would have made sense? I get why Donna might be tough but.. hm.
It does annoy me that all those people have stated their interest and he doesn't contact them, Heck, William Russell and Carole Ann Ford are appearing as cameo roles in An Adventure in Space and Time for the making of Doctor Who, so it's not too much of a stretch.