Come here for the produce. Don't come for the customer service.
This is where I do my weekly vegetable and fruit run.
This store has fresher fruits and vegetables than some of the other places in Chinatown. The prices are super reasonable especially if you buy multiples of fruit/veg. For example, 10 Gala apples for $4.50 or 10 navel oranges for $5 (or $0.59 each).
I don't recommend buying other grocery staples (e.g. bread, butter) or Western foods from here. The selection is limited and prices for these items aren't any different than the big box stores. Have not bought meat or prepared foods from here, so can't comment on the quality.
Also, there's a $30 minimum if you pay with credit card. Easiest to pay with cash.