Dans Les Arbres are exactly what I expected them to be:

expertly performed but a little too safe. I've actually come to appreciate some modern ECM releases (Tim Berne's Snakeoil albums, mainly) but this is just too clean and polished and ECM-y in production to show the material and musicians in the best light - it's improv with no rough edges, which makes it smooth which makes it the improv equivalent of smooth jazz, just not as nauseating, which appellation is fitting because it's on ECM aka the more bourgeois Windham Hill. both albums are genuinely pleasant, however, rather than being "merely pleasant" in the most pedantically-looking-down-on-the-music sense of the phrase.