I strongly support the 3-star review. This set is not the good source to listen to these broadcasts. Orrin Keepnews has deleted many announcement bits, but what is worst, many announcement bits where Bird played behind Symphony Sid.All of this to include the 1947 Carnegie Hall concert, which is in plenty of other issues, and four 1950 tracks which don't represent the complete session, just arbitrarily the small segment acquired by Savoy in the 1970s. The complete 1950 session is also to be found somewhere else.The Japanese version of the Royal Roost material is fine but hard to get. A new one in a 4CD box devoted exclusively to the complete Royal Roost performances and including various truly appropriate bonus sessions surpasses it and has just recently appeared in Europe.