Come On Die Young is Mogwai's best album, though the consensus has it being their weakest. It's also an album that, unlike every other Mogwai release, demands you listen to it from start to finish—each of its 67 minutes—for maximum enjoyment.
I should mention I like the way this album builds. The first half is all mellow and nocturnal, before launching into "Ex-cowboy"—which very subtly introduces white noise into the mix—seguing into "Chocky"—which continues the trend, albeit in a less discreet fashion—concluding with the totally awesome "Christmas Steps"—which starts in the same leisurely fashion of the songs from early in the record prior to launching into some fucking killer metal riffing.
Overall, the album requires great patience on behalf of the listener, but I think it is worth it.