I had the K20 remaster before getting this version, so that's all I can compare it to, soundwise. As is the case with many SACDs, the greatest difference is the "open-ness" of the sound compared to the older CD. However, I'm not sure if the K20 is the best redbook version, as I know a lot of people have a problem with these. Musically, it's of course a gem, a sweet set of music from Miles' great quintet of Coltrane, Red Garland, my hero aka Paul Chambers, and Philly Joe Jones. One of 5 records they cut in one shot before going to Columbia (now owned by Sony, who released Miles' SACDs non-hybrid, the bastards). This if of course a hybrid and therefore probably the hottest digital version on the market. I don't really plan to listen to the CD layer because I'm content with it sounding great at home and good enough to rip on the go, not that I even need to do that because I know this album by heart. As I'm listening to the penultimate track, I'm wondering if this might not be a bit bright sounding for some. This is something that seems to bother me less than others- there have been a few times when some of complained about brightness that I didn't notice upon first listen, so now I'm paranoid about it. The 6 tracks here include a personal favorite, If I Were A Bell, and a tune by Sonny Rollins (Oleo) and Dizzy (Woody 'n You). Recommended, including for the folks here who are still dipping their feet into the wonderful world of jazz.