This disc is a lot of fun to listen to.  It was made as Miles was progressively improving.  As one of the four recordings made by the group in a two day span, it's amazing how concentrated this effort is.  Coltrane sounds amazing as usual, and Red Garland's astounding use of the left hand is prominent also.  Paul Chambers sounds wonderful with a great bass sound we've all come to know, and Philly Joe's drumming is full of energy.  There's a very nice version of "My Funny Valentine" here, complete with Miles's custom harmon mute.  I felt Miles recorded the tune better later on, however this is also classic.  "Blues By Five", a Garland tune, is a well known classic where everybody just jams.  I love Miles's solo here, a perfect example of how he can take some simple improvisational ideas and make them amazing.  I recall once in a 7th Grade Jazz Band I was soloing on the tune "Blues By Five" but did not play in the chord too well, the director told me to try again in rehearsal, so I just played Miles's exact solo note for note.  He said that was "better".  Such great memories come with this disc.  Then there is a crazy version of Sonny Rollins's "Airegin", which is Nigeria spelled backwards.  This tune was never one of my favorites, but Miles and the group do a great job with it.  The best is saved for last, the medley of "Tune Up" and Benny Carter's classic "When The Lights Are Low".  What motivated these guys to record these two tunes in one track still beats me, but it sure sounds great.  You can't beat interaction this good.