I've purchased SO many copies of Kind Of Blue over the years. I hope you bought the Columbia/Legacy CK64935 release. It's easily the best sounding of the bunch, and the first (OK, second, but the Mastersound version doesn't have the alternate take of Flamenco Sketches) to correct the speed issue on 3 songs. The tape deck used in their recording was 5% off speed, and those songs were sharp enough to sound in the wrong key.