I was a bit concerned that Publix might suffer, but considering their very full parking lot last week, that concern is not too strong.
Aldi fills in a niche that was missing - they offer incredibly inexpensive fruits and vegetables that are adequately fresh. They are not, however, a full service grocery store. They do not have organic options (that's what Earth Fare is for.) They don't have a pharmacy. They don't have an in-house bakery. They don't have a butcher. They don't have fresh seafood. They don't have a large selection; your choices are all Aldi's house versions of name brand foods, and that's it.
What they do have is staples for your fridge, freezer, and pantry at a very reasonable price. Our weekly grocery bill has already plummeted by $15-$20.
Coming up later today: Taste of Athens 2012!