I think that both Mystery Of The Yeti albums represent the peak of psychedelic chill-out. I've heard nothing even close to these two masterpieces (well maybe except the first two Shpongle albums). They are supreme in their genres in every aspect. Most beautiful, most psychedelic, most diverse and most ahead of their time.
And the overall concept & feeling of those two albums, there's nothing like it. At least I haven't heard.
Today's Carbon Based Lifeforms and Entheogenics are just pointless la-di-da compared to these two. I'm right am I not?