People either love or hate Aldi. Not much in-between. For me, I really like it. It's small, which means that it becomes my convenience store. I can get in and out quickly (except from 6-8pm on weeknights and after noon on weekends, when the line is a bit crazy, though it moves quickly). I shop with cash or debit anyway, so that's not a big deal, and I don't mind bagging my own groceries. It's actually a pretty employee friendly place, so I sort of feel good about shopping there.
Around here, the prices are better than everyday prices, but not as good as sale/coupon prices. However, if the things I want/need are not on sale or rarely go on sale, then it's the best price for me. I buy some staples there, plus some extras that I can get good prices on.
The only things we haven't loved are their oyster crackers and their cheese (it's not very sharp, and we just don't prefer it; we would and sometimes do eat it, though).
Saltines
Tortilla chips
olives (regular green and black)
sugar
spices
marischino cherries
cocoa and other baking stuff (including nuts)
milk
eggs
butter
fancier cheeses (gouda, munster, havarti)
frozen fish
canned fruit
tomato paste
canned mushrooms, beets, and sometimes beans
dried beans
dried chiles
produce (ours mostly comes from about 3 hours away, nad it's usually very good)
It's definitely worth a trip to check it out. Sure, they have plenty of generic brand Fruit Loops and gelatin cups, but they have lots of other stuff, too.