I only have SIESTA, but I like it very much. Of course, as Miles Davis is featured soloist and "official" co-composer on one track, it's reminiscent of his earlier, brooding work for Gil Evans. "Sketches of Spain" is the biggest influence (appropriately). Some of the music which appeared in both "Sketches of Spain" and SIESTA also turned up in slightly adapted form by Jerry Fielding in THE GAUNTLET.
I should check out his other work, but I'd probably be more drawn towards his jazz recordings. I don't know how they have evaded me for so long.