This is a great starting place for anyone new to Aphex Twin. If you are already an Aphex fan then you've got this. Unless... well, then, you better buy this one quickly and not tell anyone that you didn't own it at one point.
If you know anything about Aphex Twin then you already know what the music on this single is going to sound like. Also, unless you don't own a TV, you have probably seen the video to the title track late at night. If you haven't, then, it's like the front cover but moving. Also, if you don't know anything about Richard D. James and his wonderful music then the songs sound like that cover.
The title track is his usual mix of genius electronic music, loud and abrasive drum - I'd like to say beats here, but, really it's less of actual beats and more of just beating the drums - and weird and terrifying sampled (I assume) vocals. It sounds simple enough but after Richard D. James gets his hands on anything, instead of turning to gold, it turns to Windowlicker.
Formula is weird, good; I like it anyway, but is basically just horrible noises for five minutes.
Nannou is a great song that's simple but not in anyway simple. I know you get me so don't pull that face. ... Actually, I can't even be bothered to write about it. It's just a really catchy music box tune.
Anyway, buy this now. It is worth it for Windowlicker and Nannou.