One opened in my city, only Aldi within 50 miles. It is always packed and both of the major regional grocers have raised their "now hiring" wages several dollars, run much more aggressive deals, and their parking lots are maybe 4/5ths as full as they were a month ago.
Which is great for me because I've been to several Aldis and realized it just isn't for me. Being one guy with a pretty weak appetite, the actual dollar savings don't really come out to much for me (maybe -$10 versus a major grocer if I'm really stocking up), and the "Aldi Experience" doesn't really mesh with how I buy food. It's still great to have them in the market, though.
It is telling that Aldi is successfully expanding in the USA while keeping the same model that made it big in its home market of Germany and the rest of Europe.
When Walmart tried to gain a foothold in Germany, it hemorrhaged billions before giving up. The managers responsible covered their asses with bullshit about cultural differences or unions, but the truth is that they just couldn't offer competitive prices. Looks like, even in the US, shoppers favor low prices over wasteful frills like greeters.
Great, now that they have bought winn-dixie, and are moving in places, mostly, where there are failed/failing regional chains, we will have even less competition.
Remember, despite saying Aldi does not discriminate based on union/desire to unionize, A LOT of their ex-management say they were straight up told to fire anyone who mentions it, and they would rather get sued for it, than allow it.