It's difficult to think of anything that hasn't been said already, but I used to put this on with The Number of Magic every time I rode the Shinkansen in Japan. I would fall asleep in Kyoto, wake up in Osaka, go back to sleep in Shinagawa and wake up in Nara. Every time I was greeted with these mesmerising albums. They both rank very high, but I have to say Virtual State beats Number of Magic as there's a little more mania about it. Number of Magic is very hypnotic and dubby. This is more psychedelic, with repeated leitmotifs of radio transmissions and strange dialtones. It's also got a bit more of an Afrocentric vibe like Digital Lifeforms. Frequency Band is one of the best ambient techno tunes ever made. I love this album probably because of the strong association I have with it and Japan. For everyone else, try to listen to it first. If you like his other work, you'll like this.
I can't rate it highly enough.