I remember purchasing this album after hearing the incredible and incendiary warehouse banger Quoth. Expecting more similar music, my delusion was big. It turned out that Quoth was an exception here, if I may put it so. By far the heaviest, rawest and in-your-face piece of music on the album. Beware that back then I had little to no knowledge of Warp's sound and musical tendencies.
Now, not to leave the impression of a biased and pissed off customer, let me reflect upon the rest of the album. The music is not bad at all, ranging from early IDM, ambient, break beat techno, with acid lead segments from time to time. Unfortunately, not much of it sticks out and strikes you like Quoth did to me. Sure it is all quality, and some if it is mighty fine; the haunting melody on Polygon Window taking turns with the memorable acid lead, the forceful and driving opener, the quiet ambience of Quino-Phec.
The rest is skip material in my book. A cool sequence here and there, some occasional playful acid synths and lush pads aside, "Surfing on sine waves" does not have much in store for my ears. For early Richard D. James mind blowing material, I suggest heading right to the Aphex Twin "Classics" release on R & S.
As for Polygon Window, I urge everybody to go check out Quoth, one of the most ferocious tunes he has ever done. My highest recommendation would be buying either the CD Maxi [WAP 33 CD] or the vinyl counterpart [WAP 33], both of which have two astonishing mixes of Quoth, plus two other worthwhile tunes.

If you are into mainstream or chart music, this may take getting used to and require patience. If you like dance music but don't want to have to move like mad all the time, this is great. A few of the tracks are ambient, while a few are pounding and repetative. As a whole, this early techno album is worth a listen if you are familar with Aphex Twin's work, but might not be the best place to start.