Nacional > Has great customer service, you will have sometimes 3 attendents helping you at checkout counter, they have a great selection of fruits and veggies, and prices are good. ( meat is pretty good also )
Pola/Sirena, kinda like Wall Mart supercenter, Groceries and everything else, usually low priced stuff. Fruits and veggies good, meats Ok, prices good. the Sirena on Winston Churchill is the best one to go to, the new one on the Luperon sucks, its crampy, badly layed out, and parking is awkward.
Bravo: good meat , prices not so low but quality generally good, I'll go there when Milk is on special
( got kids? ).
Jumbo, looks like they modeled this store after "Target" but with a super market also. the new store on Luperon, is really nice, prices are good, and food items are at decent price. everything you need in one place.
Carrefour, used to be my favorite place to shop, but as products from the US have dropped in price, and stuff from Europe has gone up, I just do not shop there, they have always had problems ( since day 1 ) with items having to be priced checked, lines are slow, their fruit and veggies are usually more expensive than other stores and with less varieties. but they do have great buys on appliances, and things for the house, also they sometimes offer 500g of dark chocolate for like 140 pesos, ( me likes a lot
)