Aldi is one of my favorite grocery stores. It's one of the two leading global discount supermarket chains, too. They have more than 10,000 stores in 18 countries. 
I have never been to one. Sounds like a store I would like. Are they reasonably priced.
Aldi
Aldi (stylised as ALDI) is the common brand of two German family-owned discount supermarket chains with over 10,000 stores in 20 countries, and an estimated combined turnover of more than €50 billion. Based in Germany, the chain was founded by brothers Karl and Theo Albrecht in 1946 when they took over their mother's store in Essen, which had been in operation since 1913. The business was split into two separate groups in 1960, that later became Aldi Nord, headquartered in Essen, and Aldi Süd
Lidl
Lidl Stiftung & Co. KG (; ) is a German global discount supermarket chain, based in Neckarsulm, Germany, that operates over 10,000 stores across Europe and the United States. It belongs to Dieter Schwarz, who also owns the store chains Handelshof and hypermarket Kaufland.
Lidl is the chief competitor of a similar German discount chain Aldi in several markets, including the United States. There are Lidl stores in every member state of the European Union, except Latvia and Estonia. Lidl stores are also present in Switzerland,