Darwinfish - "Poire William" is made by putting crushed up William's pears into a neutral grape spirit, then after a bit, removing all the pear (oh, sometimes you can get those tacky bottles with an intact pear in side though). All the pear goodness goes into the alcohol, all the alcohol evil goes into the pear. It tastes mildly of William's pear (the smell is stronger). Depending on the base alcohol, it can taste of grappa/marc. For a much better, but similar alcohol try Eau de vie de poire william. It is a true fruit brandy (eg. distilled, not just soaked in fruit as above) and is like drinking the soul of the pear. Yum. There are a lot of good brands from Alsace, you may be able to find a brand called Trimbach. Also, look out for other fruit Eau de vie, such as Mirabelle (yellow plum). Avoid the Eau de vie made from pine needles at all costs, blarrgh!