Before today, I didn't even know there were any Aldi's in Philly. I went to one in Europe and it was very economical. I shop at the TJ on Arch St. and many of the customers there come on foot. (Unlike the one on Market St. and 22nd? which has it's own free parking lot). It might just be a question of convenience. To me it wouldn't really be worth the time to take the subway up to Aldi to shop since I wouldn't be able to carry much.