I use one. Lot's of debate on the threads here (search "alumiminum vs", open a beer, and watch the night fly by!).
Overall, I make sure that it's oxidized, and not overly concerned about some of the Alzheimer's concerns. I may get a SS pot some day, but that will be because I'm buying a bigger pot anyways.
I've been using one for about 10 batches. No complaints... they are affordable and conduct heat much better then SS. I can boil 5+ gallons via my stovetop