I bought so I can put it on my iTunes and, one day, make my killer introduction to the Youth compilation. I already have it on vinyl, so I may send this off to Oxfam shortly.
Sister is one the band's three big 1980s albums. If you are new to the band, it is probably as good a place to start as any, mixing together their squalling guitar noise, rampant experimentalism, pop sensibilities, and moments of almost blessed out beauty (not always on the same song). It has some total classic tunes - 'Catholic Block', 'Kotton Krown', 'Hotwire My Heart', etc. You love it.