I don't really think agree with any of the answers.
"Confield" is a unique album in that it's far, far and away the most inhuman, cold, alien, and in many ways, the most difficult album Booth & Brown ever wrote.
Autechre are an interesting band because you can follow their discography chronologically and see them experiment and try new things with every album. Starting with Incunabula, starting to get more experimental with Tri Repetae, reaching perfection with Chiastic Slide, and then really started to swim in the deeper end with EP7. Confield is the album where they completely ceased making music and let the machines take over. Confield is the musical manifesto of Autechre's synthesizers.
I find it hard to listen to because there's no real groove or melody or anything. It's just cold. Alien. What keeps it interesting is the chaos in the music -- the decaying time signatures, the random and chaotic beats, and best of all, the last track, Lentic Catachresis. That's one of my favorite Autechre songs - it starts innocent enough, but decays further and further into total, complete noisy insanity.
(edit: which is to say that while I think it's an excellent and worthwhile album, it's not something I listen to often)
- Chris