In the uk ASDA has recently been taken over by Wallmart. Previous to this it was known for selling reasonable quality at cheap prices. Our local one has just undergone a rebuild, and is now about half as big again as it was before. A couple of things I used to like were the fact that they rarely changed the layout so I knew where stuff was and I could get the essential grocery shopping done relatively quickly (I hate shopping and stopped using Tescos after they kept swopping stuff round almost every week) another thing I liked was that they usually didn't use "piped" music. I can't yet find anything in my new store and ended up running out of time and going home without half of what I would have bought, and they have this irritating voice droning on at you about what a wonderful store they are and why don't you buy this that and the other. AAAhhhhhh.... I just hope this is not a sign of things to come, but I rather think (judging by the comments on Walmart above) that it may be.
One good thing, because of the multicultural nature of the population round here and the density of supermarkets I doubt if the'd get away with racist policies as 1) they'd have NO staff, 2) they'd pretty soon have NO customers and 3) they'd be taken to court very quickly.