Just visited the new A&M Grocery in the basement of the Macau Ferry Terminal. Basically another Costco importer, but unlike Gateway the place is VERY clean and well lit and seems to be slightly better priced.
Besides this new place and Gateway, are there any other "big" US grocery stores (I know, big is relative)? Both of these seem to be buying in bulk at Costco and importing it over here for resale, judging from the brand names I see.
Anyway, worth a look if you need industrial sized candy bars and whatnot.
A & M US Groceries | Facebook
B06-B09
Shun Tak Centre
200 Connaught Road Central
(MTR Sheung Wan exit D I think)