I never knew Trader Joe's and Aldi's were related companies. I had jokingly referred to Trader Joe's as the "Aldi's" or organic food stores, but never thought the comparison was so close. I was mostly basing it off of the cheap prices and smallish store sizes.
I've generally been impressed by Aldi's ability to maintain a quality shopping experience while maintaining such low prices. Typically in the US, bargain-type stores tend to skimp on things like cleaning, repairs, merchandising/stocking, etc. This isn't really the case with Aldi.