Blue Mitchell's albums on the Mainstream label were (to my ears) generally terrible. The one I had hoped would be the exception was this one -Vital Blue. With Joe Henderson as a sideman my expectations were quite high. It turned out that the album was a mixed bag. About half the tracks were (to my taste) quite enjoyable. The remaining half were spoiled by a vocal obligato that made me want to quickly move on.
All of this is disappointing as I have greatly enjoyed Blue Mitchell's playing as leader and sideman on numerous albums on a variety of labels other than Mainstream.