I love these pieces, though they are some of the more difficult pieces to understand by Babbitt.
I also think that the fat vibrato in Rolf Schulte's playing is inappropriate for Babbitt's music--it is too expressionistic, and Babbitt's music is not expressionistic!
It has to be lithe and fleet in a jazzy vein. Babbitt is an American composer.
I still give this 5 stars--I love this recording.