I've been to 4 stores on my travels, Baltimore (now closed I think), Chicago, Everett, and Denver and had great costumer service. Many if I remember rightly have been in industrial areas, where shipping is the norm. I like the Denver one the best as they have just about every brand and accessories you would ever need where as the others were brand specific.
Years ago there was an AB-ish store nearby me in Alexandria. The owner really kind of creeped me out the few times I was there.
One of these days I envision a cross country trip in diapers where I hit all the AB-friendly stores from the east coast to the west.